So, you are left with a story about a guy who shares his wife... and that's it! The plot goes nowhere.
Yes and that would be realistic.
I suppose that couples, who are in this lifestyle where the husband is sharing his wife, that the husband must be very confident or he would not able to share his wife.
Then there must be a high level of trust in the relationship also.
The overview states:
A lighthearted visual novel about Netorase (Wife Sharing). Hana is a loving and understanding wife that realizes her husband fetish, and while Yuma, a young man, is staying at their home during college, she takes matters into her own hands. Her husband, our protagonist, anxious at first, realizes the pleasure of sharing his wife.
The last line "Her husband, our protagonist, anxious at first, realizes the pleasure of sharing his wife"
> He could start out anxious and is growing more confidence in the course of the affair and enjoys it even more <
The game is lighthearted, so I guess there is no plan to steal the wife from the husband.
Why is it not possible to have a confident and competent MC for a change?
The scenes don't need to change, but some parts of the dialog and many folks would skip it anyway.
I don't see the game suffering from it.
There is still space for drama, conflict and thrill in the game without a wimpy MC: wife as a teacher, hubby as teacher and introduces the boy in the age of a possible son in his wife, a possible impregnation could also happen.
It's indecent enough for lighthearted game in my opinion