Doubt (tonogai Yoshiki)
This is definitely a great example of a psychological manga with very good twists, mystery, and best of all- horror. 'Doubt' is a short series that is based on the familiar plot of 'survival games', something you might recognize if you've ever read or heard of Battle Royale. The purpose is to survive, be the last one standing, but all the while, needing to survive even if you've won. Keeps you at the edge of your seat, an eager read, definitely among the best in psychological survival game horror genres.
Shigatsu Wa Kimi No Uso
Piano prodigy Arima Kosei dominated the competition and all child musicians knew his name. But after his mother, who was also his instructor, passed away, he had a mental breakdown while performing at a recital that resulted in him no longer being able to hear the sound of his piano even though his hearing was perfectly fine. Even two years later, Kosei hasnâ€t touched the piano and views the world in monotone, and without any flair or color. He was content at living out his life with his good friends Tsubaki and Watari until, one day, a girl changed everything. Miyazono Kaori is a pretty, free spirited violinist whose playing style reflects her personality. Kaori helps Kosei return to the music world and show that it should be free and mold breaking unlike the structured and rigid style Kosei was used to.
Koe No Katachi