Lest we forget, Shouma used to have a heated rivalry with Sawa early in this story. So I guess it makes sense that people thought he was hard to talk to because he didn't like dealing with the club his sworn rival was in. Getting Oota to fill that role isn't so necessary anymore since that animosity has died down, but it puts Oota in a good position to do something about his and Sawa's current relationship. Now please, do something...
"Isn't he tired?"
Maybe he is, but I'm sure he can take it. He chose you and powered through, knowing he has to deal with all this. And thinking you've been inconsiderate is something that actually inconsiderate people never do. You're just putting yourself down too much.
"I didn't think you liked me that much."
Me too, considering how your relationship with her started.
Bruh, not like this. The implosion is so sudden and hit me like a bucket's worth of ice water. He went through hell and high water for the slim chance to win her love, and then he suddenly gives up like this? Maybe I overestimated his feelings for her. And Marika, please. I've been ignoring it for a while, but her insecurity about herself really were some of the cracks that ended up breaking this relationship.
So... a new arc about these two I guess? Some more serious romances do have couples getting back together after a fight. I mean, this is like their first serious fight after becoming a legit couple.
The candle that burns twice as bright burns half as long
This is what comes to mind. Were they too successful that the author had to either pump the brakes or crash them because the other pair was still incapable of catching up? They overheated and need to cool their heads off.
How funny would it be though if they get back together and be in their second relationship before the "main" couple even gets to their first... or I guess that just rubs salt into the wounds of the other pairing. I'm kinda tempted to add the Drama tag to this now but nobody else seems to think it's needed so I won't.