ミカサ、エレンと濃厚なセックスの最中に女装コスしたアルミンが乱入して３Pに！黒猫、桐乃とケンカして隣の京介の部屋に一時避難。で、そのまま京介と初エッチ！

Mikasa and Eren are having passionate sex when Armin, dressed as a woman, bursts in and they have a threesome! Kuroneko and Kirino get into a fight and take refuge in Kyosuke's room next door. Then, they have their first sex!