Ok, So a little bit lore update here. The
(.5) chapters are un-canon so the Boyfriend is still a virgin.

Source: https://twitter.com/senukin69/status/1828113409830682646

Fine fine, he's the translation:
1. GF (on the phone): Loser looking ah femcel goth girl with loser aura. (she was teasing thhe sister)
2. GF: YA MAD? womp womp (womp womp is just a noise to trigger someone.)
3.Sis: That's the last of it. I can't not that this anymore, y'understand!?
4.Sis: I am going to stay at your home, you devil!

Source: https://twitter.com/senukin69/status/1828135191925399910