Nice. Here are a few scenes I thought up:
- Lara disguised/mistaken as College student and hit on or invited to a party
- Lending Lara out to one of the other guys (given a choice) for extended periods of time like in the Marina VN (around a week or so, maybe a month). Can be just her being lent out, or a wife swap between the two couples. The lending can also extend to letting the two go on vacation together.
- Whoring Lara out. Can either be through a formal escort service, or an informal streetwalker alley thing and have Lara dress in a skimpy outfit.
- A game show-type of situation, similar to RKT Javs. One scene was a glory wall that the partner had to guess who was their lover, and another was a challenge where the husband is allowed to have sex with an actress and if he can last, he wins, but if he loses, his wife has to have sex with a male actor. The former scene can be made a netori by having the role be swapped and having the mc guess which is Lara, and ntr by having Lara purposefully choose wrong.
- You can Introduce Lara and/or the mc's first partners and have them recall their past together (with a little bit of jealousy from the other party depending on which route you're on or how you decide to react).
- Visible changes to Lara's hair, clothes, speech, and general style as a result of her corruption. Can progressively make her appear like a gyaru or mature seductive woman, depending on how you support her, or she could just decide to act/dress like the former if on an ntr route.
- Can have a scene involving pregnancy where the two parties decide they want to get the other's partner pregnant. Can have it turn ntr by having mc not be able to get the job done (or just straight up be infertile), or have Lara spike his drink with a male contraceptive. Can be netori by having the mc do the same to the other guy (or send Lara or his partner to do it for him). Alternatively, can be a scene involving just Lara (or one of the other girls) acting as a surrogate as a favor to one of the girls (or Lara) who is infertile.
- Can have the mc build an nts/netori harem by having the girls lend themselves to other guys. He stole them away from their partners, but he sends them out to have sex with others.
- Can introduce an old college friend of Lara's or Holly's friends who is a sex worker (either works at a brothel or a strip club), and can have Lara (and some of the other girls) cover for her, or work for her since her business is failing.
- Kind of related to Lara being mistaken as a college student: can have one of her inexperienced students (she's a researcher, but can be explained by saying she had to give lectures) confess his love to her. Can be nts by having the mc be ok with it and telling her to keep their marriage a secret so as to not break his heart, or can be netori by having a female student notice the mc while at the university and have her confess to him.
- Detailed Exploration/flashback of Lara's past (can also include Holly and maybe some of the other girls), and a reason for why the mc has and NT* fetish.
- background music. Some other guy is making a similar-ish vn and some of the songs he uses for the bgm are from S;g. Since you named the university Lara works at after Viktor Chondria, I think it fits.
Great work btw. Looking forward to seeing future releases. You've really got something great on your hands. Let me know what you think of these scene/story recommendations or if you want me to elaborate. I've got a few more, but I don't want to write up a massive wall of text.