The manga has historically followed the timeline of a single school year. With graduation approaching and the "Marriage Practical" officially over, Chapter 80 and the following chapters will focus on the aftermath of these events.
"You're an idiot," she whispered, her voice cracking. "You're such a huge idiot. You can't just... you can't just say that. You can't take it back. Not now."
"Because I don't want to let you go!" Jirou roared back.
The door opened.
"I don't want to be Shiori-san's boyfriend," Jirou said, the realization solidifying into truth as he spoke it. "I don't want to be Minami-san's partner. I want to be your husband. For real."