Mama Sis ~Okaa-san to Watashi, Docchi ga Ii no?~

After his mother died due to illness, he moved to Tokyo at his father's request.
His home is the YAYOI Inn, where Mireille lives and works and looks after him.
It's been three years since his father disappeared from Tokyo, Mireille has become like a real mother to him, enveloping him in care and affection.
But inside they were lonely, he had lost his mother, and Mireille had lost her husband a long time ago.
And to make up for each other's loneliness, they crossed the line.

- It's not cheating. We're not blood relatives. Our age is quite far apart, and I'm still a student.
That's why it's so important for you to have a good idea of what you're getting into.
There are lots of things you can do to make your life easier. .......

- And yes I forgot to say Mireille has two daughters, the oldest Misa, and the youngest Miu.
The two of them also live in the house together and they just so happen to catch !!! Mireille and I were having sex.
- That's disgusting! Pervert! - They were screaming.

I honestly didn't care what they thought of me. I thought so, and I was naive ....