Shonen-ai/Yaoi

This is a super hilarious oneshot. You may think the housekeeper is an innocent uke and the three other guys are the cliche semes (left to right: the smart glasses, the hottie smooth talker, the cool kid) who are going to be irrevocably in love with him, but little do you know, the plot twist is pretty unexpected.

From one of my favorite yaoi mangakas comes a new and exciting story, with childhood friends and delinquents.
The MC, Kirara, is the girliest but most badass mofo ever. (more to be added when the series updates)

So, the MC is a shy, gay kid who has never dated before and tries to get some by signing up on a online gay dating site. He talks with someone online, finally meets up with his online partner, almost gets conned into a sex tape and accidentally summons a demon with his semen. (yes, you read that right.)

It's a star-crossed lovers kind of story, with a yakuza and a policeman + 100% humor. Ueda (the policeman and seme) and Aki (the yakuza and uke) have the most healthiest relationship I've ever seen in a yaoi manga, where they fight, they make up, solve problems together and have tons of sex.

A spin-off series of Konya mo Nemurenai, which focuses more on Gorou and Verde. The two are a super idiotic couple and it's hilarious + a little heartbreaking at times (because idiots in love are heartbreaking).

I absolutely adore this one, as all of them are excellent oneshots.

The MC (also the uke) works in a flower shop and is constantly sexually harassed by the manager (the seme). They have a cute relationship and reading this will make you smile because it's so adorable and great.

In the past, Shunichirou (Shun) was in an accident where it injured his leg and Yuuma is incredibly guilty because he feels responsible for it. Fast forward to current events, Shun uses this to trap Yuuma into a relationship(?), because Yuuma still feels guilty and also feels obligated to be by Shun's side forever. A powerful and intense oneshot, where Shun is a very possessive seme (to the point of being a yandere) and Yuuma does whatever Shun wants + has anxiety/insanity problems.

The prequel to Kyoushitsu no Hajime.
The seme is a teacher who looks for an easy target among his students and finds a gloomy boy with no friends who starves for affection. It's a twisted teacher and student relationship.

The sequel to Yugami Hajime.
It expands more on the teacher and student's twisted relationship and the teacher even pulled in another student onto their "secret". My own interpretation is that the other student, while was somewhat aroused by the sex, also felt pity for the uke and helplessness (because he doesn't know what to do).
One of the most frightening yaoi oneshots I've ever read.