Issei was having fun time with his friends, he was very happy tonight, because tonight maybe the day he was so much waiting for.
He got some work from Rias and some requests that he was doing today which makes him very tired today but he was not angry or anything because Rias promise him a very great treat.
He still remembers how Rias said it into his ears that he instantly imagined already what will be the treat.
This is the story of Issei and his harem pleasureable Nights.
It’s just the MC fucking around with no real plot or direction. The "story" is literally just a string of random sex scenes with no substance behind them. No development, no stakes, not even a pointless filler. Lazy, pathetic, and a waste of time.