@PantsuKami
1.that teacher is her former classmate that she hates after he confessed and go out with her as a joke...not friend in the slightest just acquitance with bad history
2.arese also knows the risk since rinko gave her the condition and the reason behind it...he just act childish snd possesive because he is jelous of the teacher even knowing the risk.
3.the teacher will benefit greatly with the break-up since he is aiming for rinko...if he is not why would he even said "maybe the next is worthy opponent"
4.thats not warning thats pressuring...read the words he spout at that moment he even guilt trip arase.
5.if they didn't listen after they talk thats their problem atleast they are warned and the result of their action is upon them
6.read number 2 again...it just happen that he slip out some words and the truth come out to rinko and her friend..so if bad things happen to rinko that teacher will be making enemy with not only rinko but with her friend also
7.so guilt tripping a child with some hidden intention is a good thing then...you can say and tell other people about something without pressuring and guilt tripping them...