He's not a threat, in fact, if you see the raw, you'll feel sorry for him.
Here ya go https://tkor.camp/그-알파를-꼬시는-법
Addressing someone as “anata” is not rude. It’s actually kinda formal, when you’re talking to someone you’re not acquainted with. You may also find the word “ anata” used between spouses, which in this context it means, honey/darling/sweetheart. Using “anta” on the other hand is rude.
Addressing someone with whom you are not acquainted as "anata" is actually considerably rude. It's basic 101 Japanese etiquette. The use of pronouns is ordinarily avoided, unless you want to go out of your way to be impolite as in this context. You are correct in your other statements, however.
Even if this manhwa has 1000+ chapters, I’d still gonna read each and every one of it. (But only if it doesn’t stray away from the main couple).