Natsuiro Penguin


TitleNatsuiro Penguin
Original title夏いろペンギン
DeveloperLittle Princess
PublishersLittle Princess


Since his parents have gone abroad on business, he now lives at his cousin's house in a town, where he used to live. He meets various childhood friends there. It's busy, but he enjoys his school life. This is a love comedy adventure game taken place in a small town. Who will stay by his side in the end...?

[From Eroge Shop]

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Main characters

Hiiragi Yuka柊 柚夏
MeasurementsHeight: 155cm, Bust-Waist-Hips: 85-59-82cm
HairAntenna, Pink, Short, Straight, Twin Tails
BodyAverage Height, Pale, Slim, Teen
ClothesHoodie, Knee-high Socks, Loafers, Maid's Dress, Miniskirt, Pleated Skirt, Sailor School Uniform, School Uniform, Sports Shoes, Sports Swimsuit, Swim Cap, Thigh-high Stockings, T-shirt, Uwabaki, Yukata
PersonalityAtashi, Energetic, Food Lover, Sensitive, Sweets Lover, Tomboy
RoleClassmate, Friend, High School Student, Part-time Worker, Popular, Schoolmate, School Swimming Club Member, Waitstaff
Engages inSwimming
Voiced byFuyumiya Mea


One of Ryou's classmates and Saori's best friend. An energetic girl who's popular with both girls and boys. She is an excellent swimmer and is hyped up to become the swimming club's next president. Despite her masculine hobbies and likes she has a girly side to her as well.

Hisaki Mei久葵 芽衣
MeasurementsHeight: 163cm, Bust-Waist-Hips: 89-59-85cm
HairBraid, Cyan, Parted to Side, Spiky Bangs, Waist Length+
EyesTareme, Violet
BodyAverage Height, Big Breast Sizes, Pale, Slim, Teen
ClothesArmband, Glasses, Hairpin, Knee-high Socks, Loafers, Maid's Dress, Ribbon Hair Tie, Sailor School Uniform, School Uniform, Thigh-high Stockings, Unusual Hair Ornaments, Uwabaki, Yukata
PersonalityClumsy, Hardworker, Kind, Nature Lover, Timid, Watashi
RoleChildhood Friend, High School Student, Neighbor, Part-time Worker, Schoolmate, Senpai, Student Council President, Waitstaff
Voiced bySuzuta Miyako


Ryou's upperclassman and the student council president. She can't say no to anyone asking for her help and tends to worry over whether she's actually helpful or not. Loves large penguins and collecting penguin goods. Mei is also both childhood friends and next door neighbors with Hibiki.

Mizumiya Saori瑞宮 茶織
MeasurementsHeight: 157cm, Bust-Waist-Hips: 72-56-79cm
HairBlue, Parted to Side, Straight, Thick Eyebrows, Waist Length+
EyesRed, Tareme
BodyAverage Height, Pale, Slim, Small Breasts, Teen
ClothesBlouse, Hair Ribbon, Loafers, Miko's Dress, Miniskirt, Pleated Skirt, Ribbon Hair Accessory, Sailor School Uniform, Sandals, School Uniform, Tabi, Uwabaki, Zouri
PersonalityAirhead, Emotional, Hardworker, Kind, Outgoing
RoleChildhood Friend, Daughter, High School Student, Honor Student, Miko, Popular, Schoolmate
Subject ofTeasing
Voiced byYukihira Shizuku


Ryou's childhood friend and Yuka's best friend who is a bit of an airhead. Saori is an honor student who easily gets along with everyone and has a kind personality. Her parents own a shrine, where she also works as a shrine maiden and secretly has her own fan club due to this. Saori also has a complex over her breast size and her personality changes when somebody touches her chest.

Side characters

MeasurementsHeight: 20cm
HairAntenna, Grey
RoleBird, Mascot Character


A fairy penguin and the mascot character of the cafeteria Premiere.

MeasurementsHeight: 145cm, Bust-Waist-Hips: 73-53-74cm
HairAhoge, Blue, Long, Shaggy, Twin Tails
EyesBlue, Tareme
BodyAverage Height, Flat Chest, Pale, Slim, Small Breast Sizes, Teen
ClothesArmband, Jacket, Loafers, Old Type School Swimsuit, Puffy Sleeves, Ribbon Hair Accessory, Sailor School Uniform, Shorts, Thigh-high Stockings, Uwabaki, Yukata
PersonalityDeredere, Energetic, Mysterious, Nature Lover, Sweets Lover
RoleHigh School Student, Schoolmate
Engages inCosplay, Swimming
Voiced bySasa Rumiko


A mysterious girl who always appears out of nowhere and hugs Ryou. Nothing is known about her aside from her name and how she loves both Ryou and chocolate cornets. She claims to be Ryou's childhood friend.

Nogisaka Kei乃木坂 慧
MeasurementsHeight: 148cm, Bust-Waist-Hips: 71-53-75cm
HairAhoge, Brown, Ponytail, Sidehair, Spiky Bangs, Straight, Waist Length+
BodyAverage Height, Pale, Slim, Teen
ClothesLoafers, Pantyhose, Ribbon Hair Tie, School Uniform, Thigh-high Stockings
PersonalityHardworker, Immature, Stubborn, Tsundere
RoleCousin, Full Sister, High School Student, Honor Student, Schoolmate, Younger Sister
Voiced byMurasakibana Sumire


Ryou's cousin and Madoka's younger sister. She is at the top of her grade, but has a surprisingly childish personality and has a complex over her small body.

Nogisaka Madoka乃木坂 宙
MeasurementsHeight: 165cm, Bust-Waist-Hips: 91-57-88cm
HairBrown, Shaggy, Short
EyesGreen, Tareme
BodyAverage Height, Big Breast Sizes, Pale, Slim, Young-adult
ClothesLace Lingerie, Skirt
PersonalityFriendly, Hardworker, Kind, Sleepyhead
RoleCousin, Famous, Full Sister, Management, Older Sister, Roommate
Engages inCleaning, Cooking
Voiced byKazane


Ryou's cousin and Kei's older sister and the manager of the cafeteria Premiere. Because her parents are on a long trip, she takes care of it. Used to go Ryou's school, where she was a charismatic student council president and admired by both the students and teachers; she's also seen as a bit of a legend. Despite her hardworking and tidy personality, she loves sleeping and her personality changes when somebody tries interrupting her sleep.

Shirase Moka白瀬 百歌
MeasurementsHeight: 151cm, Bust-Waist-Hips: 79-59-83cm
HairBlue, Intake, Short
EyesBlue, Tareme
BodyAverage Height, Pale, Slim, Teen
ClothesBoots, Collar, Crown, Earrings, Garter Belt Stockings, Miniskirt, Wristband
PersonalityAtashi, Haraguro, Obsessive, Outgoing, Yandere
Voiced byMizushima Rion


A newcomer idol working at the same agency as Chikane who has been recently gaining popularity. Moka is a bit obsessed with Chikane and sometimes has delusions about her. She acts sweet in the public eye, but in reality is quite scheming.

Suzuriya Yua硯谷 ゆあ
MeasurementsHeight: 147cm, Bust-Waist-Hips: 75-53-79cm
HairAhoge, Blunt Bangs, Hair Loopies, Intake, Odango, Pink, Shoulder-length
EyesRed, Tareme
BodyAverage Height, Kid, Pale, Small Breasts, Younger Appearance
ClothesBody Ribbon, Clothing with Ribbons, Miniskirt, Off-The-Shoulder Shirt, Pleated Skirt, Tank Top
PersonalitySelfish, Sweets Lover
RoleHomeroom Teacher, Teacher
Engages inCosplay
Voiced byTamiyasu Tomoe


The social studies teacher who also doubles as Ryou's homeroom teacher. Her real age is unknown but she calls herself eternally 19. Loves cosplaying and often does it in school. Though she has an easily irritated and selfish personality she's always supportive of her students.

Takane Hibiki貴峰 ひびき
MeasurementsHeight: 168cm, Bust-Waist-Hips: 84-60-86cm
HairShoulder-length, Sidehair, Violet
EyesPink, Tsurime
BodyAverage Height, Pale, Slim, Teen
ClothesLoafers, Sailor School Uniform, School Uniform
PersonalityProtective, Watashi
RoleChildhood Friend, High School Student, Popular, School Kendo Club President, Schoolmate, Senpai
Engages inKendo
Voiced byShirahime Mio


A student in Class 3-B who's Mei's childhood friend and next-door neighbor. She is also skilled at kendo, the kendo club's president and a regular at national tournaments. Due to her cool appearance, combined with the aforementioned fact, she is quite popular with the girls. Unlike what her appearance suggests, Hibiki loves reading romance novels.

Takatsuki Yuuji高槻 優二
MeasurementsHeight: 175cm
HairGreen, Short
BodyAverage Height, Pale, Teen
ClothesSchool Uniform
PersonalityEnergetic, Idiot, Lazy, Ore, Otaku, Pervert
RoleClassmate, Friend, High School Student, Schoolmate
Subject ofDomestic Violence
Voiced byNoriyuki


One of Ryou's classmates and his best friend. He has known both Saori and Yuka ever since middle school. Yuuji secretly likes idols, which is why he's unpopular with the girls, and constantly does stupid things, which usually make Yuka to deliver him a kick or two. His grades are average mostly due to his laziness.

Yaehashi Sana八重橋 紗南
MeasurementsHeight: 150cm, Bust-Waist-Hips: 79-59-83cm
HairLong, Parted to Side, Pink, Spiky Bangs, Twin Tails
BodyAverage Height, Pale, Slim, Teen
ClothesAnkle Socks, Blouse, Contact Lenses, Hair Tie, Ribbon Tie, Skirt
PersonalityClumsy, Shy, Sweets Lover
RoleFull Sister, Management, Producer, Younger Sister
Engages inPlanning
Subject ofDisappointment
Voiced byMatsunaga Yuki


Chikane's manager who works at her older brother's idol agency. Sana is a clumsy and shy girl with no sense of direction who aimed to become an idol in the past but failed to do so, which is why she's doing her best to make and push Chikane to become the top idol. Loves cakes and one of her hobbies is eating at cake buffets. Due to having poor eyesight she wears contact lenses.