With all due respect, this game is much better than SOD. First, Yuri is married. The tension is much higher. Second, Alvin doesn't seem to be as dumb as Fred. Third, Alvin is about to find out everything, unless Yuri manages to notice Alvin's presence before he's caught.
This game has everything to be a true NTR game. The husband doesn't have to be dumb. He can start investigating, suspecting, the author could create dangerous situations in which Yuri and her lover almost get caught. Sexting would be a good start, she sends photos to her lover behind her husband's back and then he starts investigating an alleged adultery.
Wow, there are so many possibilities.
It's a shame the game was abandoned.