[Bungo Stray Dogs] My Escape From Prison Made Me Invincible

Blurb:

Ever since he became aware of the world, Nakahara Chuuya has lived with a guardian who has a split personality.

Although his guardian's behavior always gave Chuuya a strange feeling, he was understanding enough to accept the fact that his guardian was not like other people:

By day, the personality known as "Qing" took control. At night, the primary personality, named Verlaine, took over the body.

What Nakahara Chuuya didn't know was that this so-called split personality was nothing of the sort.

The guardian he knew was actually two completely different souls. The original Verlaine had been forced to share his body with an outsider.

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Notes:

1. The protagonist belongs to a species called the Xianzhou native heliobus. Its defining trait is possessing other people. As long as it has enough energy, it can seize the body of any living creature, which is why it spent several hundred years in prison. The setting comes from Honkai: Star Rail, with some original additions. You can follow the story even if you haven't played the game.

2. Yokohama is the main setting. From the start, the protagonist possesses Verlaine (Verlaine: Have you no manners??). At first Verlaine is unwilling, but eventually he comes around: after all, he doesn't have to do the day shift, and at night he can cuddle his little brother to his heart's content (Chuuya, having his face pinched: You can't just touch a boy's face whenever you want!). The protagonist will help him deal with most of his problems.

3. Later, the protagonist and Verlaine will separate. Otherwise, dating while using someone else's body would be way too weird. Be sure to read the warnings in Chapter One.

Theme: Spreading truth, goodness, and beauty