
I'm very sorry to hear that your friend's confession ended in such a horrible way such as that, and I do hope your friend may be able to find someone much better than that guy who could have at least rejected it a little more delicately.
I can't tell your friend to stop liking him, as no one has the right to say anything like that, but I would suggest not obsessing over one guy. With this quarantine and lock down business happening, going out on friendly outings may be off the list for now, but try to have as much fun as you can together as friends~ Who knows? Maybe surprising things will happen in that time hahaha! ヾ(❀╹◡╹)ノ
I honestly feel so bad for Masayuki, and I think I can understand how frustrated he must be towards Gino. Just imagine how you'd feel if the guy you've been pining towards, for over 3 years (or something), tells you that he's "as straight as it could get", and you respect his personal space... but some other guy comes out of nowhere and effortlessly has your crush swooning over him. Rather than punching your crush directly (as some people may have suggested, surprisingly), isn't it natural to want to take your anger out on the person who stole the heart of your long-term crush away from you? Masayuki knew Keito before Gino, and has been watching over him with love way longer than Gino has, but Keito is choosing Gino over him. That's honestly really heartbreaking.
(Edit: I just realized my entire comment didn't post the first time so I'm here to rewrite the rest all over again )
However, that isn't to say that what Masayuki did was in the right at all. Keito, as straight as he was, happened to just fall in love with another person... who just so happened to be a man. Nothing more, nothing less. The point that I was trying to relay is that people have their reasons for certain actions, so please don't hate on them until you know the reason behind it (but if the reason is BAD, then by all means, feel free to hate/lecture away). Masayuki took his anger out on Gino, and though he really shouldn't have let his emotions out like that, it's no hidden fact that we're all but mere humans run by complex emotions. As Keito can't control his heart, Masayuki... (uh)... couldn't control his fist and anger (I guess).
...ON THE FLIP SIDE OF THE COIN, it's refreshing to see how mature and professional Keito can be (it's probably just me, but professional and mature men are pretty attractive~ ). Even after letting his concerns out at Gino about not wanting to be his f*** buddy at all, he didn't let that affect the workplace and a good portion of their daily lives, and it was pretty cute to see Gino trying to avoid touching Keito in any way because he loves his food THAT much.
TLDR; I hope the drama with Masayuki clears up in the best possible way, and I hope to see more of Keito being extra cute with Gino.
...Let's see if this posts correctly this time.