Well … that explains Umimi's "lie", at least. She lied that she just wants to be with him to keep other men away, she was being serious when she asked him out.
Why does it feel like Riku's world revolves around Takt? Why does Takt have him by the balls in everything he does?? TAKT TAKT TAKT bro c'mon, if you are gay/bi deal with it and go out with Takt!