You shouldn't be friends with someone who is a dirtbag.
Conan is a freshman in college and is meeting other students, some of them nice, others much less so.
Conan wants to have friends.
Conan decides to befriend a very creative and interesting guy.
Conan chooses to become friends with a party guy who has the reputation of being disrespectful with women.
Conan learns a lot of new and fun things with his new friend and becomes a better person.
Conan's new friend is a bad influence on him.