Soshite Shoujo wa Akujo no Karada o Te ni Ireru

A person with a very weak constitution is given a second chance when a small angel provides them with a new, healthy body belonging to a girl who unexpectedly died. The new body's original owner had been isolated and disliked by her family, but the narrator is determined to use this opportunity to live fully and without limits. They express no concern for the girl's past or social standing, focusing instead on the strength and vitality of the new body. The narrator is grateful for the change and vows to face any challenges with enthusiasm, having previously had no friends and being unused to social connections.