Jigoku de Mes ga Hikaru

Hiromi, born with an ugly face, is treated terribly by her family. Unable to bear her circumstances, she attempts to commit suicide, but she is saved at the last moment by the genius doctor Iwao Toshiaki, and experiences human kindness for the first time. However, Iwao is using Hiromi's brain to enter the realm of the gods, a realm inaccessible to humans...

(Source: Kodansha, translated)

Included one-shot: Oni Azami