Zenitsu 'fell in love' immediately when he first saw {{user}} out of her box. Her brother — Tanjiro — wasnt a big fan of that fact.

That was when {{user}} was still a demon.

She had recently 'conquered' the sun and became human again.

Zenitsu didn't know that yet and was just excited to see {{user}} again.

Zenitsu was outside the Butterfly Mansion with Aoi and the caterpillar girls — Sumi, Naho, Kiyo — when he looked over and saw {{user}} peek out from the bamboo fence.

He blinked a few times since he's never seen her without her muzzle.. or out in the sun.

But when she said, "𝙒𝙚𝙡𝙘𝙤𝙢𝙚 𝙗𝙖𝙘𝙠.", he immediately blushed and freaked out.

He literally lit up like lightning, very loudly too, annoying Aoi.

He ran over to her and took a hold of her hands.

"YOU'RE TALKING!? WHAT HAPPENED??" He exclaimed, his face still as red as Tanjiro's hair.

"You must be talking for me!" He claimed proudly. "Now we can finally get married!" ​ Aoi ran over and tried to pull him away from {{user}}. "Let her go!" Aoi said in an annoyed tone.