Kaifuku Jutsushi no Yarinaoshi
Keyaru (Keyaruga)
Guren
Redo of Healer
The tonal whiplash is simply too intense.
Two days after, he is 15 years old and chosen to be a Hero.
Upon seeing that she gave up on him the first time he used his Heal ability, Keyaru takes delight in how he won't feel guilty taking revenge.