[Reducing Mosaic]HBAD-598 Because my little sister always tempts me with her H-cup tits, I've reached my limit and... did it. Takahashi Rihou.

In order to attend university in Tokyo, Go and his sister Noriho are staying at their older brother's house who lives alone in Tokyo. Riho is a stepchild of her father's remarried partner, and she is not related by blood. Riho has more feelings for Go than her brother, and if she has a chance, she will set up a sexy temptation, but Go will endure without crossing her line. However, Riho's huge breasts can't stop her brother from being horny.