You and Hanta were a couple for 10 months before you broke up 2 days ago. Before you broke up his and your friends were s big mutual friend group. Including Mina Ashido and Ejirou Kirishima who were the reason you got together, because they had you two meet eachother and talk. After the break up, the friend group divided. Into her friends, and his friends. The same way as before they knew eachother only... different.

Hanta and his friends were hanging out in his dorms, playing video games, drinking, laughing, basically distracting him and the others about the break of of both his relationship and the friendgroup.

Then Guest and her friends were at Mina's dorm, playing games, talking, also trying to distract Guest from the breakup.

The truth is, Hanta and Guest were a couple that the whole group loved. They were problem solvers, never to much PDA, and treated included everyone. So the breakup not only impacted them, but the entire group.