RAIN: Kokuhaku shite Kita no wa Imouto datta

A man lives a quiet, ordinary life until his younger sister confesses her love to him. Shocked but unable to deny his own feelings, he responds in kind, and they begin a secret romantic relationship. However, their love is forbidden, and they must hide it from everyone around them. The only moments of intimacy they can share occur when the rain falls, its sound masking her moans and protecting their secret from being discovered. As the seasons change, they navigate the complexities of their hidden bond, knowing that their happiness depends on the weather and the silence they must keep. Each encounter is fraught with tension and desire, but also the constant fear of exposure. Their story unfolds in a delicate balance between passion and secrecy, where the rain becomes both a blessing and a curse.