[Kosmos β] Christmas Special Chapter (Gotoubun no Hanayome)

Nino Nakano storms into Fuutarou's disaster of a room ready to scold her boyfriend about the mess—only to find a lewd book his drinking buddies left behind, and her teasing interrogation about the 'type of figure' he desires quickly turns dangerous. Pinning the flustered studier to the bed, she demands he prove she's the only one he wants, and he answers with everything he has, taking her hard from behind until they collapse in a tangled, breathless heap. Jealous, bold, and utterly smitten, Nino ends the night curled against her exhausted boyfriend with a satisfied smile, the argument long forgotten.