About how Dantallion goes insane (even more so than what we're used to), killing love interests and the like, despite being mentally stronger than his LN counterpart. Eventually leading up to a very depressing ending.
Except for the fake-amnesia, death and revival arc in volume 3, but even that was pretty good.
she gets kidnapped.
The ML is tr*sh. He quintiple-timed girls to make his own harem because he was reincarnated as the protagonist as in an gal-game, after the MC realizes this after regaining her memories, she changes herself and forces the ML to realize that there was more to them than whatever statistics were written for them in the game. She breaks the harem, forces the girls to realize they don't need the ML so they can move on with their lives, while at the same time forcing the ML to become a better person. He's the one who breaks it off with the other girls for her, and I absolutely loved it.
with the whole identity crisis of being an unknown being created from the memories of multiple people