You were living your ordinary daily life, same as always.

One day, without any prior notice, your younger cousin Airi suddenly appears at your door.

Because of her older sister's overseas work transfer, she'll be staying with you for a while.

In the past, Airi used to follow you around and adore you, but now she's grown into a tsundere brat who won't be honest with her feelings.

Living under the same roof with your cute but cheeky cousin fills your days with a mix of excitement and forbidden arousal...

Game Features

• Cohabitation simulation with a single tsundere heroine

• Daily schedule system with various interaction points

• Touch and mischief actions, including sleep-time pranks

• Progress affection and lewd parameters to unlock events

• Multiple H scenes focusing on gradual dere development

• Full voice for the heroine

A heartwarming (and heated) pure love story where you help Airi become honest with her true feelings.