Synopsis: Okaa-san ni ha Himitsuda Yo (Colored)

"Kaisei's first time...I'll get it." Kaisei successfully got accepted into a university in Tokyo and is living in the house where his mother's friend Miyabi and her daughter Naen live. Despite being swayed by the angelic Miyabi and the slightly cheeky Nen, he is living a smooth university life. One day, Kaisho happened to be at the place where Rensui, another friend of his mother's and a university lecturer, was receiving his contract expiration. She is made to drink lotus water as it is... an unexpected development in which she is robbed of her first time! ? After that day, Kaisei begins to spend his days in a daze, wondering, ``What can I never say to my mother!?'' !