[Demon Slayer] Miss Sunflower Needs Watering

She transmigrates into Demon Slayer after binding herself to the Plants vs. Zombies System. Her starting plant is a sunflower, which should have been the best thing ever for a player...

Looking at the mosaic-covered interface, Hinata Aoi's mouth twitched. But why was the system the hybrid version? No, the... mating version?!

What do you mean, producing sunlight requires me to play a game of [Match Pairs] with different high-energy individuals to gather enough energy?! Even the direction the plants grow depends on the other person's attributes... Is this Match Pairs game even appropriate? Is this how tower defense games work?!

But whatever. When she first transmigrated into Demon Slayer, she had no cheats and lost everything. Four hundred years later, she's not the same person she was back then! She has to blast the heck out of them with Peashooters!

Full of anticipation, after borrowing starting energy from her teammates in the Demon Slayer Corps, Aoi solemnly planted a special seed in her flowerpot, one left over from her first playthrough and named “Regret.”

Yoriichi Tsugikuni once dreamed of demons reduced to ashes, and a blazing sun falling into his arms.

After many long years, that sun shone upon the earth once more, drawing him into the mortal world and turning him into...

“Plant a seed and grow a... Huh? Yoriichi? And Michikatsu.”

The familiar girl gazed at him with tender affection. “You two look like you have really high DPS.”

Yoriichi looked bewildered. “...Hm?”

He looked at the strange plant on the other side of the flowerpot, which seemed stuck just before it turned into a demon. “...Brother?”

Michikatsu, whose spirit had somehow bugged out and been forced to possess a mutated two-headed sunflower: “…”

All living beings resent the bright sun hanging high in the sky, shining on everyone but them. But humans and demons often have very different troubles.

Muzan Kibutsuji: “I hate the blazing sun for following me around and shining on me!!! Stay back!!!”

Being in the sun is bad enough, but why has his subordinate Kokushibo suddenly started acting so strangely... Always mumbling about sending the sun and moon over to the enemy's side!

[Read Before Starting]

A crowd-pleasing, powerful heroine adored by everyone! And plenty of people have a crush on her! Romance-focused, a self-indulgent story. Many original settings, canon pairings broken up, plenty of brother threesomes, out-of-character behavior, and scenes with a green frog opening its mouth and shouting. Read at your own risk if that's not your thing.

Synopsis created on December 16, 2025.

Theme: Work hard to make up for every regret