I wander good sir what thy sauce is.Yes, ma'am!
https://mangadex.org/title/d1f8fd50...-gakuen-no-chouten-ni-kunrin-suru-sou-desu-yoI wander good sir what thy sauce is.
I don't even think she has actual boyfriend before, she might only faking it out, or just using "Ri-kun" for convenience to get closer with protagJust a note, but I'm thinking her previous BF may have dumped her simply because she exhibits the stereotypical red flags of an abusive (boy/)girlfriend.
Them trying to interdict in your social life, telling you whom you may or may not meet, is like No. 1 or 2 on the list of things people are told to watch out for in abusive relationships.
He doesn't even have to know she's a yandere secretly. Her overt actions are eyebrow-raising.