Read at your own risk.
Barouque chrysalis manhua
Yume yume shinjuu
Litchi hikari club and is prequel although I suggest you read the prequel after the sequel/main story (has a bit of gore too)
Yoru wa tomodachi (I thought this one was actually pretty cute)
Sora odaite oyasumi
Shiiku gakari rika
Blood (yaoi)
have to try some of those :D
http://www.mangago.me/people/tag/84879/Psychological/
when i look at this, some of these stories maybe do not deserve this tag, but whatever ╮( ̄▽ ̄)╭ those poorly rated are not recommended :D
buna! recomand ten count http://www.mangago.me/read-manga/ten_count/
si killing stalking http://www.mangago.me/read-manga/killing_stalking/ (●'◡'●)ノ
Hello, community! I am searching for yaoi manga that has a psychological side and makes you ask yourself questions. (+some hot yaoi scenes too why not) Can you recommend me some pls? ^.^ [I have already read Moritat, What Lies at the End & Bastard]