[Warabino Matsuri] Sassy-Sister Complex! 4.0 (COMIC ExE 25) [Full Color] [Team Koinaka + cutegyaru]

Miki bombs her mock exams, so her doting older brother burns his day off tutoring her—only for the lazy gyaru to doze off mid-lesson, leaving him to decide a little 'compensation' is owed for being such a kind sibling. What begins as a furtive titfuck against her sleeping body escalates fast, his resolve crumbling as he buries himself between her huge breasts and then takes the offensive entirely, pounding her from behind while she snores. But Miki was awake the whole time, and catching her dirtbag brother red-handed becomes perfect leverage: weekly study sessions, cake from the station, and one more round to get her off.