Harem Jujutsu, Kaikin: Teihen Inkya wa Ou ni Naru

"Do what your master wants, okay slave?"

After a lowly introvert has a run in with cursed magic, he becomes king of his high schoo! Now, those around him must respond to his every desire...

(Source: Coolmic)

Note: Simultaneously released in long-strip and traditional formats, with 6 volumes and 18 episodes respectively.