My Little Brother's Got Me by the Balls

Overview

College student Ryuta's (Ryu) been troubled by strange dreams of late. When his mom remarried three years ago, he got a new step-brother, Matsuri, and he keeps dreaming about their relationship taking an unthinkable turn! Sure, Matsuri's cute enough to be mistaken for a girl, and at home, he acts so vulnerable Ryu's heart won't sit still. But, it's still not normal to have dreams like that, and they've made Ryu's life a nightmare... Then, one day, Ryu hears some strange sounds from Matsuri's room, and peeks in to find his little brother doing the unspeakable! This is a compilation of sweet and spicy stories from the new manga artist Shin Yamagata! (Source: Renta!)

Source: AniList