With all the cries against Ichika's 'moral character', I can't see any of
us acting any better if put into his situation.
With IS, females have tipped the gender balance of power - and he has 5 up-and-coming new stars to the IS World Stage all gunning for his affections openly and a school full of girls who are at least interested in talking with him. Not to mention his (hawt) older sister can be considered a living legend within the IS world.
I know I sure wasn't a saint when I was 15years old.... He would have had to have training from a monk to withstand that sort of daily temptation. That and Chifuyu wasn't around as much since she was working so of course she couldn't smash his head in if he did something out-of-line.