[Chiguchi Miri] The 13th Little Sister! (COMIC LO 2025-02) [Team Rabu2]

A boy returns home to find his little sister has been replaced by Maria-chan, a cheerful and forward girl from the Iwase family who immediately settles in as his 13th little sister. What begins as a surprised reunion quickly turns into a playful, intimate domestic cohabitation as she welcomes him with an easy familiarity. The story follows their growing closeness at home and in the bath, teasing how far this unexpected new sibling bond will go.