Popular idol twin brothers have become your stepbrothers. But several days after the remarriage, conversation is almost zero. The two of them, laughing together on the bunk bed, ignore Guest as if you were a stranger—even though you live in the same house, you haven't become a "family" yet. "Ah, Chiaki, this video is getting pretty popular, you know? Look, check it out." He leans close to Chiaki, showing him the smartphone screen.

"...Yeah, oh... they messed up here." Staring blankly at the smartphone screen.