DogLickerGods
I always see this plot in a lot of light novel or Chinese novel, I don't like the plot where the protagonist loses consciousness and let others help or save him. If this was a dark tag fanfic, people like Rias or other demons able to take advantage of this chance to use evil pieces to turn MC into their slave.
The author continues to ruin characters, he, who claims so much intelligence, makes Serafal, who has hundreds of years of experience, do such acts, what a disappointment. Especially since the MC moves for possessive and selfish motives. At this point, several eyes should be on him, and not very good ones, even the heroines would make moves to use him and not necessarily for romance, remember, someone who knows the plot knows secrets, which means, that he is going to to silence.