[JUFE-209] The remeass of a pale youth in which parents forgot their big and cute sister-in-law and reason during their honeymoon and asked for it enthusiastically. It's Tanaka.

When I was a student, my father decided to remarry. My new mother has a daughter who is younger than me. I have a dark personality and few words, so he treated me very naturally. It was innocent, bright, and the character was good, and I was gradually deprived of the heart by the body with a lovely and womanly bulge. One day, my parents are going on a little late honeymoon, and I'm going to spend a few days ing with my sister-in-law. I never thought it would be like that.