Demon Slayer: The Introvert Binds to a Romance System

Kazama Aoi was an utterly ordinary Japanese high school senior who accidentally transmigrated into the world of Demon Slayer and was forcibly bound to a rather eccentric "Romance System."

System: "Ding! Go for a walk in the rain with the Water Hashira. Reward: Breathing Style proficiency +10."

Kazama Aoi: "...I'd rather die."

To stay alive, she was forced to resort to a series of outrageous antics:

She showered the Flame Hashira with praise, saying, "You're so warm, big bro," just to complete the "Spread Warmth" mission;

She clung to Inosuke's boar mask and refused to let go because the System ruled that it counted as "cuddling";

She even demonstrated catching poisoned needles with her bare hands in front of Shinobu Kocho, just to trigger the "Trust Test"...

From then on, the Demon Slayer Corps began looking at her differently:

Tanjiro (concerned): "Miss Aoi... are you under too much pressure?"

Zenitsu (moved): "She came up with so many ways to get close to me! She's so cute!"

Inosuke (excited): "So she really wants to have an even more intense physical collision with me!"

The Hashira (deep in thought): "This girl... is a once-in-a-century social genius, on par with Yoriichi?"

The Upper Moons: My wife really is this popular.

Kazama Aoi was on the verge of tears: "No! I just want to stay alive! Stop looking at me like I'm some rare species!"

This is a comedy about a girl forced to navigate a battlefield of romantic rivals, only to accidentally win over the entire Demon Slayer Corps.

P.S. This story does not break up Obanai and Mitsuri, but all other couples are broken up.