If the Eric character is your personification of NTR good for you. I personally really really really hate that character. At their first meeting he choose to threaten the MC if he got in his way considering the the MC smaller and not financially capable of challenging him. Then he starts on his girlfriend's daughters (and again threatens the MC to stay out of his way). His so called help with Alice is to belittle her and actually does nothing to help, the tutors he supposedly got for Lisa seem like shit because if the MC does not help her, her grades drop. All the protagonist wants is to have sex with them nothing more. He sees an opportunity to get to Kira and takes it (threats again). Skipping a few events (for someone so much more powerful that wallet scene is pathetic) after you kick him out guess what? If you guessed threats you guessed right but this time these are directed at Ann. Some people tend to lockstep Eric and NTR which I don't understand, but for me the character is a short dick, pre-ejaculating, manipulative, fraudulent, low self-esteemed, vindictive, parasitic, pathetic, imbecilic and just ridiculous.