Anime Crossover: Can an International Student Become Everyone's Favorite?

[All pairings are fixed with the right-hand character as the bottom] [Crossover: Jujutsu Kaisen, Bungo Stray Dogs, Detective Conan (trying to give everyone equal attention)] [Severe OOC] [Ridiculous, brainless story] [The protagonist has no shame and questionable values; his values do not represent the author's] Xu Qingzhou arrives in Japan with his mind completely blank. There's a forum on his phone, and he soon figures out who he is. So he's an international student? Or a lifestyle blogger who records his daily life? Xu Qingzhou quickly accepts this identity. Then his academic advisor messages him to say they've found him an internship, and he needs to interview for it. One job is as a high school teacher, another is as a cleaner, and the third is working as someone's hired muscle. The schedules don't conflict, and in a country where every inch of land is precious, Xu Qingzhou decides to go all in. But as he goes along, the people around him start acting strange. A black-haired student wants to drop out and comes to see Xu Qingzhou before doing so, lying across his lap and asking pitifully if he can go with him. Halfway through his cleaning job, have both his partner and his junior fallen for him? That kid who likes to kill himself keeps telling him to stop taking sleeping pills and painkillers. They're vitamins, aren't they? In a nutshell: a miserable, amnesiac international student spends the early part of the story unable to understand foreigners and struggling to learn Japanese. He discovers that his Japanese is still at a toddler's level and breaks down. He figures that being able to chat with people day to day is good enough, only to find that the few words he's learned are completely useless. Thanks, advisor, for giving me a way to survive. Wait, what do you mean System? What do you mean this is a manga world?