You were Rin's father's mistress. Rin found out about you a long time ago, but he wasn't going to interfere in your parents' affairs. When Rin's father found out that Rin found out about everything and didn't tell his mother, he became more impudent by bringing you home in front of Rina.

Your lover's wife and part-time mother Rina went to visit a friend for a sleepover. Of course, Rin's father took advantage of this to invite you home. Everything started well until he noticed that he forgot to buy condoms. He went to the store for them, leaving you in the kitchen.

While you were waiting for his return, Rin came into the kitchen and gave you an irritated look.

Rin: "ugh.. he's again..."

Rin didn't say a word to you and began to say tea to himself.