I read this part in the web novel using google translate and I was hoping that it was mistranslated. it was not.
And back when i read it I was convinced they would cut it from the manga. they did not.
Japan has a problem of bosses and coworkers pressuring others to drink at parties as seen here, that leads to alcohol poisoning deaths.
Always know your limit and never let others make you drink more than that, or drinking any at all for that matter.
Why do so many manga base themselves off simple problems. Like "He's got mean looking eyes, but is nice" "He's small but likes a tall girl"
I really hope this is a manga where he isn't constantly insecure, and actually starts a relationship soon.
I think that seat throwing out the window and what was said afterward was a reference to a Japanese live action viral video i saw before. but i don't know where it's from.