Here's my oneshots list. I've added if the story is lighthearted or deep below each of them and my personal rating of them. Deep ones are usually sad too.
https://www.mangago.zone/home/mangalist/2915987/?filter=&page=1
You're heaven sent! Bless tysm
You're welcome<33
1. Karasu Otoko ni Kiotsukete
2. Yukkuri Aruite Jyuugofun
3. Itadakimasu wa Koi no Aji
4. Love Romance in a Haunted House
5. Gozen 3:00 no Ice Cream (this one is explicit but still quite nice)
What are your favorite one-shot stories? Gimme the sweetest, fluffiest, wholesomest, one short reccs pls. I was deceived (by myself) into reading a sweet story but the MC's background is too tragic and now i'm upset ╥﹏╥