Masterpieces stories with peculiar plot (9/10 or more)

Suicide / School life / Depression / Cute protagonist / Comedy (dark comedy) / Friendship.

Lee Hoon has had it tough his whole life. After his mom died from sickness and his abusive, alcoholic dad abandoned him, Hoon is left with nothing but a mountain of debt. With no hope in sight, he resolves to put himself out of his misery. Yet ending his messed-up life turns out to be more difficult than he first thought…

Warning : It is a DARK comedy.
Suicide, self harm, depression.

School life / Comedy / Other Chance in life / Old -> Young transformation / Friendship / difficult past / Romance.

" Kaizaki Arata, a 27 year jobless man fails at every job interviews he had after quitting his last company. His life changes after he met Yoake Ryou of the ReLife Research Institute, who offer him a drug that can change his appearance to 17-years-old again and to became a subject in a one-year experiment in which he began his life as a high school student again."

Mystery / immortal Mc who makes things and people grow old by touching them / Drama / Heartbreaking past / Adorable / Supernatural / relearn human emotions.

"Dam, who at some point stopped growing, avoids people and leaves to the forest."