"I guess you won't settle for less than the truth. I wasn't ever going to tell anyone about this. There was a girl I used to love. I was a sophomore. It ended after I had hurt her badly. I think that's the one and only love I'll ever have."
Over dinner, Sojiro Nishikado and Yuki Matsuoka talk about Tsukushi Makino and Tsukasa Domyoji, leading him to comment that they are "the only thing [they] have in common." Sojiro then declares "Let's talk about us." Yuki blushes and becomes more nervous when Sojiro tells her to "loosen up." He laughs, which helps Yuki to finally relax. Sojiro then tells her that there is "another plate of dessert." Confused, Yuki lifts up the handkerchief from the plate and finds a room key. Sojiro says "I booked a room upstairs."
Tsukushi and Susumu Makino discover that Tsukasa has moved in next door. He seems unconcerned about being found out, having paid off the realtor. Susumu reminds his sister about going to the bath house. Tsukasa agrees to go with them and the three head off. Once there, Tsukushi can hear Tsukasa and Susumu talking from the women's side. She starts blushing when she hears a comment about Tsukasa's body. While walking home, Tsukushi thinks about how "easily" Tsukasa "come over to [her] world."
In the hotel room, Sojiro hugs a trembling Yuki from behind and then leans in to kiss her. He tells her "Quit forcing yourself to do this." However, Yuki wants to be with Sojiro no matter what though she continues shaking. Sojiro then wistfully states "I give up" and tells her about the girl he loved whom he hurt very badly. He feels that she will be his "only love." In Tsukasa's apartment, Tsukushi lends him an extra set of bedding before leaving. That night, she and Tsukasa lie awake on opposite sides of the wall.