[MTL][Nna Timun (yurarin)] Nee-chan to furo haitte akachan mo tsukutta [2026-06 COMIC MUGEN TENSEI]

Ren Momoshima’s bath-day routine collides with his intrusive older sister, whose cheerful demand—“Ren-ichi, hurry up and get in the bath!”—turns an ordinary afternoon into a charged breach of family boundaries. Teasing gives way to a breathless physical tangle, awkward encounters with curious siblings, and promises that blur devotion into taboo intimacy. By the closing classroom tableau, Ren and his sister embrace beneath the words “We became husband and wife,” imagining a bond—and perhaps a family—far beyond the conventional sibling relationship.