The pacing of this really is breakneck huh? We're never really left to breathe, always just moving onto the next big plot point. I'd have like to see them mingle and get close.
As it is right now, MC has already managed to convert the first girl in 5 chapters, has already gotten Risa to be friendly in 2 chapters; none of this feels natural at all.
And why is every other person so comically evil? MCs former bandmates, first girls former bandmates, Risa's former bandmates and her father...