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Original titleピリオド
LengthLong (30 - 50 hours)
Studio Oshaberi Nyanko
Studio Daoluong
Period Sweet Drops
LinksWikipedia (ja), Wikidata, VNStat


“Dear God, I now make this, the single request of my life…”
—–The near future, Nagasaki.
Into this city, with its long and checkered past
was born a rarity: a child with wings.
I don’t know when it started, but
The school overlooking the town
came to be known as hallowed ground –
and that is where we met.

Though summer comes closer, there is nothing new, and a boring day just rolls on. But, his boring life suddenly ends. He is forced to look for a key of the observatory. He reluctantly accepts it, but gets a little bit excited. An exciting feeling.... A hunch of something will happen. Just before the summer holiday, he meets her....

[From HeiseiDemocracy, and ErogeShop]

ADV 3.0 Branching Plot 3.0 Early Branching Plot 3.0 Multiple Endings 3.0 Romance 3.0 Slice of Life 3.0 Pettanko Heroine 2.9 Late Sexual Content 2.9 Student Heroine 2.9 Drama 2.9 Underweight Heroine 2.9 Defloration 2.8 Foolish Friend 2.7 Student Protagonist 2.7 Student Council 2.7 Male Protagonist 2.7 Only Virgin Heroines 2.7 Other Perspectives 2.7 Summer 2.7 Loli Heroine 2.6 Protagonist's Kouhai as a Heroine 2.6 Heroine with Wings 2.5 Long Sexual Scenes 2.5 Protagonist's Childhood Friend as a Heroine 2.5 Protagonist's Senpai as a Heroine 2.5 Transfer Student Heroine 2.5 Modern Day Japan 2.4 Twin Tail Heroine 2.4 Bookworm Heroine 2.4 No Common Sense Heroine 2.4 Low Sexual Content 2.4 Tomboy Heroine 2.4 Tsundere Heroine 2.4 Writer HeroineS 2.4 School 2.3 Proactive Protagonist 2.3 More Than Seven Endings 2.2 More Than Seven Heroines 2.2 Unlockable Routes 2.1 Multiple Songs 2.1 Alien HeroineS 2.1 Angel Heroine 2.0 Bleep Censor 2.0 Cafe 2.0 Date Display 2.0 Flashback 2.0 Perverted Friend 2.0 Sixty-nine 2.0 Straight Lolicon 2.0 Unlockable Choices 2.0 Unlockable Event 2.0 Unlockable Hero(ine) 2.0 Class President Heroine 1.9 Dying HeroineS 1.9 Protagonist with a Face 1.9 Deredere HeroineS 1.8 Side Images 1.8 Doggy Style 1.8 School Nurse Heroine 1.8 Nakige 1.6 Modern Day 1.6 Missionary Position 1.5 Nurse Heroine 1.5 Student Council President Heroine 1.5 Teacher Heroine 1.5 StalkingS 1.4 School Nurse Support Character 1.4 Food Discussions 1.2 Christian Church 0.6 Mother Support Character 0.6 Sexual Content 0.1

Hide spoilersShow minor spoilersSpoil me! | Show sexual traits


Main characters

Kagamiya Rin加賀宮 鈴B
MeasurementsWeight: 39kg
Birthday27 March
HairLong, Pink, Spiky Bangs, Twin Tails, Wavy
EyesAmber, Tareme
BodyKid, Pale, Short (obsolete), Slim, Small Breast Sizes
ClothesAnkle Socks, Dress, Dress Shoes, Lolita, Maid's Dress, Maid's Headdress, One Piece Swimsuit, Ribbon Hair Tie, Ribbon Tie, Sports Uniform
ItemsBag, Mobile Phone
PersonalityBookworm, Cautious, Childishly Violent, Desu, Tsundere, Watashi
RoleDaughter, Kouhai
Engages inReading
Voiced byAkizuki Mai


Mitsuki's kouhai. She is often seen reading books in the library or doing work in the student council room. Rin has a brash and aburpt personality, though she acts sweetly around those she trusts. She's very close to Shigehisa's little sister, Chitose.

<hidden by spoiler settings>

Koishikawa Kohane小石川 小羽O
MeasurementsHeight: 152cm, Weight: 39kg, Bust-Waist-Hips: 73-56-78cm
Birthday14 January
HairBlond, Long, Wavy, White
EyesPink, Tareme
BodyPale, Slim, Small Breast Sizes, Teen, Wings
ClothesApron, Bikini, Dress, Dress Shoes, Maid's Dress, Maid's Headdress, Miniskirt, Ribbon Tie, School Uniform, Sports Uniform
PersonalityAltruistic, Hardworker, Honest, Kind, Low Self-esteem, Timid, Watashi
RoleDaughter, Friend, Granddaughter, Kouhai, Secretary, Student Council Member
Engages inCooking, Cycling, Shopping
Subject ofAcrophobia, Teasing
Voiced byOonami Konami


A shy but kind angel girl, Kohane trusts everyone without reserve. She's also a member of the student council.

Mizuhara Tsuzumi水原 つづみ
MeasurementsHeight: 162cm, Weight: 46kg, Bust-Waist-Hips: 82-58-83cm
HairBlue, Blunt Bangs, Braided Headband, Bun, Hime Cut, Long
EyesPink, Tareme, Violet
BodyPale, Slim, Small Breast Sizes, Teen
ClothesCollar, Dress, Miniskirt, One Piece Swimsuit, Panties, Ribbon Hair Accessory, Ribbon Tie, School Uniform, Thigh-high Stockings, Turtleneck Swimsuit
PersonalityBlunt, Curious, Ignorant, Mysterious, Strange, Watashi
RoleClassmate, Friend, Transfer Student
Engages inShopping, Swimming
Voiced byIsshiki Hikaru


A mysterious girl that transfers into Mitsuki's class. She seems completely ignorant about the most ordinary of things, constantly asking others for advice. She moves into the dormitory where Mituski lives, and starts a habit of barging into his room without asking, usually through a window.
Tsuzumi absolutely loves ice cream and enjoys it in every chance she gets.

<hidden by spoiler settings>

Sawatari Aoi沢渡 葵O
MeasurementsHeight: 158cm, Bust-Waist-Hips: 80-55-81cm
Birthday31 December
HairBrown, Green, Parted to Side, Short
EyesGreen, Hazel, Tareme
BodyPale, Slim, Teen
ClothesAnkle Socks, Body Ribbon, Collar, Dress, Garter Belt Stockings, Maid's Dress, Maid's Headdress, Miniskirt, Ribbon Tie, School Swimsuit, School Uniform, Shirt, Shorts, Sports Uniform, Tank Top, Thigh-high Stockings, Towel
PersonalityAtashi, Energetic, Friendly, Outgoing, Tomboy
RoleClassmate, Friend, Full Sister, Younger Sister
Engages inCooking, Shopping, Swimming
Voiced byMiyazawa Yuana


Aoi is one of Mitsuki's classmates and a good friend of his. She is popular with both the boys and girls of the school thanks to her outgoing personality.

Yazuki Miyu弥月 美由A
MeasurementsHeight: 145cm, Weight: 37kg
Birthday13 February
HairBrown, Orange, Parted to Side, Short
EyesBrown, Tareme
BodyKid, Pale, Short (obsolete), Slim, Small Breast Sizes
ClothesAnkle Socks, Apron, Collar, Cravat, Dress, Headband, Maid's Dress, Maid's Headdress, Miniskirt, One Piece Swimsuit, Ribbon Tie, Sailor School Uniform, School Swimsuit, School Uniform, Sports Uniform, Yukata
PersonalityAltruistic, Hardworker, Pacifist, Stubborn, Timid, Watashi
RoleClassmate, Class President, Friend, Girlfriend, School Cooking Club Member, Schoolmate
Engages inCooking, Shopping
Subject ofTeasing
Voiced byKimura Ayaka


Although her timid personality and frail physique wouldn't suggest this, Miyu is the representative of Mitsuki's class. Miyu is proficient at cooking and a member of the school's Cooking Club. Due to her nature, she often ends up overworking herself. She gets on well with Asahi.
Miyu enjoys collecting all sorts of curios, like ornamented teacups and spoons.

Side characters

Nabejima Arisa鍋島 亜理紗
Birthday24 September
HairBlond, Braided Bun, Brown, No Bangs, Parted in Middle, Shoulder-length
EyesBrown, Tsurime
BodyPale, Slim, Teen
ClothesAnkle Socks, Baby-doll, Miniskirt, Ribbon Tie, School Uniform
ItemsMusical Instrument
PersonalityDesu wa, Envious, Holds Grudges, Refined, Watakushi
RoleBisexual, Daughter, Friend, Kouhai, Musician, School Music Club Member, Younger Sister
Engages inShopping
Voiced byKusayanagi Junko


The sister of the student council president, she is hostile to pretty much anyone (except Aoi) and holds a grudge against angels. She seems to be in love with Aoi and regularly tries to get her feelings across, but is always met with refusal.

<hidden by spoiler settings>

Namiki Jun'ya並木 潤也
PersonalityIdiot, Ore, Pervert
Engages inSwimming
Voiced byShirogane Kazuki


Mitsuki's friend and classmate. He usually behaves like a pervert and idiot<hidden by spoiler settings>.

Ooshiro Chitose大城 千歳
HairCurtained, Odango, Parted in Middle, Short, Violet
EyesAmber, Green
BodyBindi (Mark), Kid, Olive, Short (obsolete), Slim, Small Breast Sizes, Tattoo
ClothesBikini, Dress, Ribbon Hair Tie, Ribbon Tie, School Uniform
PersonalityKind, Refined, Watashi
RoleFriend, Full Sister, Kouhai, Wealthy, Younger Sister
Engages inCooking
Voiced byNirai Kanai


Shigehisa's younger sister. Thanks to her upbringing, she is a polite and caring girl. Chitose holds her brother in high regard, and aspires to be like him someday. She and Rin are best friends.