Sister Breeder Episode 1

Shouta has always been a loving boy, especially with his sisters, Rena and Aina. What began as a close bond slowly turns into a routine where the caresses become more intimate... to the point of sneaking into other people's rooms at night. When Rena catches him trying to "show love" to Aina, she stops him, but for mysterious reasons, she ends up being the new recipient of all that pent-up affection. And of course, amidst unfamiliar sensations and repressed emotions, Rena falls into Shouta's training circle.