I read manga when I don't want to read, which is very often, and it's difficult to stop once I start gorging. I picked up mangas I dropped, discovered new gems, and am trudging through many for closure.
1. Killing My Sensei Softly (Sensei no Yasashii Koroshikata) by HANTEN Sharou
After school, Sensei tutors me in secret. My classmates think we have some sort of relationship, but they've got it all wrong. Sensei is a serial killer, and I am his apprentice. "Sensei, please teach me how to murder." A dark love unfolds between a serial killer Sensei and his devoted apprentice!
Starting this list off on a weird start. I don't remember how I found this manga, but it's refreshing because I read a lot of fantasy, fluff, romance, and shoujo. Almost every chapter is about finding a serial killer and murdering them. Some arcs are longer than others. The art is relatively simple/bland, and despite revolving around killing, it's not all the gory. DINER by KAWAI Takanori is still the goriest and most messed up mangas I've encountered. There is an age gap romance subplot, but it's not the romance where you're cheering them on to end up together. It's more so hoping the Sensei character reveals their past with the FL, their MO for killing, etc.