Break the Insanity Meter!

Two guys, a homeowner and his delivery man, both share a love of reptiles. What starts as a bond over a common interest quickly becomes something dangerous.

Contents: yaoi, stalker, rape, obsession

In a fictional (maybe American??) city, Conor and Simon battle against both racial and sexual prejudice to stay together. Conor is mostly normal, but Simon has definite moments of crazy. Plenty of the side characters also bring the crazy, so it's a party.

Contents: yaoi, racial prejudice, hate crimes, discrimination, racial politics, murder, sadism, extortion, prostitution, drug use, cute couple that are both remarkably well adjusted given the circumstances

While this list is more meant for excessive looney-tunes shenanigans, this thoughtful manga takes a far more grounded and relateable look at mental illness.

Shirotani, a young man with OCD, makes a connection with Kurose, a young psychologist.

Contents: yaoi, romance, thoughtful look at potential real-world challenges of life with mental illness, exposure therapy, therapist dating their sort-of patient

Sad story about a chain of people unhappily in unrequited love with one another. Heavy BDSM elements.

Contents: yaoi, BDSM, terminal illness, death, unrequited love

A classic yandere story, filled with going koo-koo for coco puffs, and rampaging, unbridled possessiveness. Lil bro Hayato finds out that Yuki-nii is gay and loses his shit. Good fun if you enjoy yandere.

Contents: yaoi, incest, captivity, spying, obsessive/possessive behavior, gay bashing

One-shot shoujou ai about a High School girl with a crush on her best friend. Seems pretty cute and normal up to the last two pages, at which point the story flips a table and jumps out the window.

Contents: yuri, High School, one shot, obsession, physical maiming

A more mild story, this one features the rare self-control-practicing yandere. Upon first meeting, an impulsive college student decides that the overworked businessman he just met is destined to be his.

Contents: yaoi, restraints, possessiveness, not taking no for an answer

Ryou goes to visit his estranged father only to be magically transported to the past where he meets a teenager, his father. It's going EXACTLY where you think it is.

Contents: yaoi, sexually explicit, incest, time travel, ANGST, pining

Older brother obsessively sleeps with younger brother, but things get worse when younger brother falls in love with his classmate.

Contents: yaoi, incest, sexually explicit, rape, underage, bird murder, unhealthy relationships, one-shot

A young heir discovers that his late father left the family fortune to the older brother kept locked away in a secret room.

Contents: yaoi, incest, rape, manipulation, mentally handicapped character, sexual abuse, historical, VERY complicated family problems