I'll explain my intention with the character. This is going to be a long post...
Pamela meets the MC for the first time in that scene where they're all forced to spend time together because of a decision they consider out of touch, made by Angela. During that encounter, Pamela notices that behind the MC's chaotic relationship with Zoe, there's a genuine concern on the MC's part to protect Zoe at all costs.
Pamela, who learned not to trust anyone because she was preyed upon from all sides while having a negligent father, sees the MC as the first man she could truly rely on. She quickly becomes attached to him and becomes increasingly convinced that he is trustworthy. Note that there are some occasions where Pamela prefers to accompany the MC rather than stay with the girls, and sometimes even stands behind him as a way of seeking protection, as in the image below:
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Of course, all of this happens at lightning speed because that's just my style. I've never hidden the fact that my focus in my games is to offer sex scenes. If this were a book, people would find it ridiculous that Pamela would trust the MC so quickly, but this is an erotic game, so I speed up the dramatic part to show Pamela's breasts bouncing around...
Anyway, the MC is a "sexual deviant", as he and Pamela conclude during one of their conversations. So, while Pamela feels protected by the MC, she is also exposed to his insane sex life. Pamela ends up kind of getting involved in his customs, where there aren't many sexual taboos, at least when it comes to his relationship with Zoe and Mila.
So we have a female character who was broken but is beginning to stand up, who knows and identifies with the MC, starts to become attached to him, begins to trust that he can protect her, starts to consider him her best buddy, then even says she loves him like a brother, and finally, begins to share intimate moments with him. This is totally in line with the theme of HS Tutor, which is friendship. All the girls start out kind of lonely and messed up, but interacting with the MC ends up bringing them into a more solid social circle. A good example is how Garnet and Charlotte hated each other at first, but after the MC's involvement, Garnet is kind of hiding her joy when she receives a box of chocolates from Charlotte.
Well, if this were Solvalley School, Pamela would discover that she actually loves the MC's cock and wants to have 10 children with him. But I don't want to do the same thing here. Pamela will remain 100% lesbian, but she will love the MC as a true friend, and as a partner to do erotic things with from time to time. There will be no description of Pamela's romantic relationships with other characters. She is there now as someone who loves the MC as a person, but who doesn't mind occasionally engaging in casual sex with him, or with him and other girls (since the MC is into group sex with multiple girls).
Her part in the harem scenes will be the same as her part in the beach scene. She trusts the MC, she hangs out with him, and because of that she ends up getting involved in group sex with the MC and other girls. It's not unlike how Charlotte finds Zoe cute in her bed with the bunny and such, and starts kissing her, before the MC arrives and fucks them both.
SPOILER: I don't know if Pamela will have an ending of her own, but if she does, it will most likely be about them sharing a place to live for some reason, and their friendship with casual sex progressing so naturally that they won't realize they are already living as a couple. They will only realize it when friends and family comment on it, and by that point, they will be so used to life as a couple that they won't be able to break up.
As for Angela:
She suspects that the MC is actually a womanizer taking advantage of his position to get close to girls. I wanted to leave this somewhat implied, but I decided to describe it explicitly through Pamela, so as not to leave any doubt in the players' minds that Angela has a certain distrust of the MC. The genuine relationship between MC and Pamela, however, will cause Angela to let her guard down and start becoming more intimate with MC. Since this is an erotic game, the idea here is that Angela will end up having sex with MC, something that was completely impossible until then.
Again, this is totally in line with the theme of the game, and it has happened before. Amelia saw the MC as an opportunist trying to steal her students while abusing the girls, changing her mind only when, accompanying her sister to prevent the MC from abusing her, Amelia realized that the MC was actually someone with a good heart who promised Maddy to stand by her side in her most difficult moment. What will happen to Angela is parallel to this. There is no way to separate Angela's story from Pamela's.
Conclusion:
Pamela loves MC more than she loves her own father who failed her, which shows that her ties to the protagonist are deep. She is a lesbian, however, and as Mila says, she should have the right to one day meet someone capable of truly sharing (lesbian) love with her. That is not the scope of the game, however. We will never see Pamela discover her true lesbian love (if that will ever happen), but we will see her having sex with the MC and sometimes having group sex with MC and the girls, out of pure instinctive impulse. And as I said in the "spoiler" above, she may even end up with the MC, under the right conditions...