Takt probably has a massive inferiority complex against Riku. “Don’t tell this to Riku” MF is so petty that he thinks that hooking up with his Kohai and childhood friend to knock him down a peg that didn’t even work. Like dude he didn’t even notice or care about the relationship until she made the first move. That’s probably why Taku hookup with her in the first place, he only wanted his “friend” to notice him and watch him be the third wheel. We’ll probably get a chapter about how Takt always felt small compared to him but idc about this man at all.