There isn't anything I wouldn't do for you.

Kenma knew something was wrong the moment Kuroo didn’t wish him a good morning. He had known his best friend since they were in elementary school. Because of this, he knows exactly what this lack of greeting means. Especially after what Yaku had told him earlier that day. Yaku had approached him at the end of their morning volleyball practice, his brows furrowed in concern and frustration radiating off him in waves. “Hey Kenma, sorry to bother but I have to ask, is Kuroo like…okay? That dumbass seemed unusually out of it today.” Normally, Kenma wouldn’t care all that much and would simply respond that Kuroo is grown enough to deal with his own shit. But the fact that Yaku of all people was concerned was a glaring red flag. If not that, then the way Kuroo kept sighing and not paying much attention to the others trying to make him smile at the very least, was even more concerning. So here he is now, after school, standing in front of his childhood best friend's apartment trying to figure out what to say. TLDR; Kuroo is stressed and bottling things up, Kenma goes and comforts him. Things are stupidly fluff from there.