"You're more horny than your sister, right?" My girlfriend's cheeky sister called me out on a date to a love hotel, and I ended up cumming inside her over and over again... Rikka Ono - Rokka Ono

The story revolves around a complicated relationship between the protagonist and his girlfriend's sister, Rikka. The two engage in a secretive and intimate encounter at a love hotel, despite the moral implications of their actions. As they navigate their desires and boundaries, the narrative explores themes of temptation, guilt, and the blurring of lines within relationships.