|Length||Medium (10 - 30 hours)|
|Developer||Silver Co., Ltd.|
|Publishers||Purple Software & Princess Soft|
|Links||Wikipedia (ja), Wikidata|
Our protagonist (Takashi) has taken the opportunity of working away from his parents home and started living by himself.
|Hair||Ahoge, Brown, Parted in Middle, Ponytail, Spiky Bangs, Waist Length+|
|Body||Furry Tail, Kemonomimi, Pale, Small Breast Sizes, Teen|
|Clothes||Mini-dress, Naked, Overall, Panties, Rain Coat, Skirt, Thigh-high Stockings, T-shirt|
|Personality||Carefree, Energetic, Food Lover, Friendly, Immature, Outgoing|
|Role||Dog, Domestic Partner, Homeless|
|Voiced by||Sugisawa Yuka|
Choko is a dog-girl who lives with Takashi. She is the first girl who starts living together with him. One day, when he got home from school, he saw her when she was sneaking into his kitchen in order to eat a croquette. He allowed her to live with him since she had no other place to go.
|Hair||Black, Blunt Bangs, Curtained, Hime Cut, Waist Length+|
|Body||Big Breast Sizes, Pale, Slim, Teen, Wings|
|Clothes||Clothing with Ribbons, Dress, Naked, Scarf, Skirt, Thigh-high Stockings|
|Personality||Grumbler, Mature, Rude, Tsundere|
|Role||Bird, Domestic Partner, Non-human, Yamato Nadeshiko|
|Voiced by||Kawabe Noriko|
Honoka is the fourth girl to whom Takashi allowed to live in his house. Honoka is a crane-girl (like a doggirl or a catgirl)who at first glance looks just like an ordinary human, but her long, weird-shaped black hair is actually a pair wings she can open and close.
|Hair||Shoulder-length, Spiky Bangs, Violet|
|Body||Furry Tail, Kemonomimi, Pale, Slim, Small Breast Sizes, Teen|
|Clothes||Apron, Dress, Naked, Panties, Ribbon Hair Accessory, Shirt|
|Personality||Distrustful, Shy, Timid|
|Role||Cat, Domestic Partner|
|Engages in||Cleaning, Cooking|
|Voiced by||Nagasaki Tsukuyo|
Satsuki is the second girl to whom Takashi allowed to live with him. She is a catgirl. Takashi found her on his way back from school and offered her a shelter from the rain because she has been standing still stunned from the it. After this he allowed her to stay with him since she didn't have a place to go as well.
|Hair||Blue, Curtained, Waist Length+|
|Body||Pale, Slim, Young-adult, Younger Appearance|
|Clothes||Bikini, Dress, Naked, Skirt|
|Personality||Carefree, Mischievous, Mysterious|
|Releases||> Side character - r1955:Happy Breeding - First Press Edition|
> Main character - r10657:Happy Breeding - Limited Edition
> Main character - r10659:Happy Breeding ~Cheerful Party~ Regular Edition
> Main character - r10954:Happy Breeding ~Cheerful Party~ First Press Edition
|Voiced by||Torii Kanon|
She is a perpetrator who humanized the four girls who now live with Takashi. She also knows all of the places where Takashi found the four girls because she planned to leave them there. She claims to be 100,024-year-old, her real name unknown, she suddenly leaves and suddenly appears. In short, she is a very mysterious woman.
|Hair||Antenna, Blond, Curtained, Parted to Side, Waist Length+|
|Body||Fish Fins, Humanoid (Non-human), Kid, Pale, Pointed Ears, Short, Slim, Small Breast Sizes|
|Clothes||Apron, Clothing with Ribbons, Dress, No Panties, One Piece Swimsuit, Shirt, Skirt, Yukata|
|Personality||Immature, Made-up Words, Naive|
|Role||Domestic Partner, Fish|
|Voiced by||Kaibara Elena|
Yukino is the third girl to whom Takashi allowed to live with him. She is a goldfish who was turned into a girl, but her long, pointed ears make her look more like a fairy. Takashi found her sitting at his door wearing only a school swimsuit. She was named after Takashi's goldfish he was keeping a while ago, whom he also called Yukino. Since that day, she is living with him in a body of a girl.