Also, I'm curious, was there anything in particular in episode 9 that triggered this reaction? Did Kasuga do something extremely unreasonable? Sounds pretty serious if you were watching mid way, had to pause and post something in this thread.
It was where I realized he was your typical harem anime loser male lead that is more honorable than anyone I've ever met in the real world. My reaction was increased because despite the situations being crazy, people in the show usually react in ways I find believable. Everyone but Katsuga still does to me. His dealings with Saeki really baffle me. I can go back to 5th grade and find situations I've seen (two girls in 6th grade were a duo that gave people handjobs on school trips, middle/high school girls getting pregnant so obviously they're having sex, used condoms in the bathroom), heard about heard about (sex in locker rooms, sex in trailers, a girl at my church who got caught getting gangbanged in the school bathroom), or experienced (a friend asking if he can borrow my car because this girl wants to give him head but is scared of doing inside the school, having a church sleepover where everyone is making out, getting a handjob at a middle school party) that make that typical harem lead aversion of anything sexual completely unbelievable and just not how teens actually work. Like the previous thing, it's made worse by how believable everyone else is.