Kai Ju Qiang Wen Liekounü

The story starts with a deep kiss with a demon-woman, which awakened his SSS-level skill. What's going on here? Scheming loli, cool genius, innocent schoolgirl, and seductive demon as girlfriends... Faced with wave after wave of bad omens and misfortune, Lin Que feels like he's under a lot of pressure, when all he wants to do is to quietly farm monsters and level up until he's the strongest!
(Source: Kuaikan, translated)