This type of ntr is no fun and lackluster you didn't even give the MC a fighting chance in the grandpa's visit, it would have been better if you gave the mc a big dick as well but he is very timid and shy the story, would have been better if after the mc witnessed his mother and sister getting fucked by the grandpa in the sauna he goes to the shower and showers while crying and then the receptionist( by the way you could make her a little more attractive) goes to the shower and sees him crying, at first she is ridiculing him in her head calling him a virgin wimp and all that, but after getting a better look she sees that the MC has a bigger cock than the grandpa that's when she decide to help the Mc gain More Confidence to fight back and then the game becomes a sandbox simulator where the Player has to Make decisions to get the ending they want, make it so there are three endings, a Harem Ending for the Mc, a sharing ending where the Mc shares all the girls with the grandpa, and a cuck ending where the Mc losses all the girls to the grandpa and is kicked out the house to live a poor life(this will be the bad ending) all this would make the game evening more enjoyable because you can choose in which direction you want the story to go.
