Vampire Juuji Kai - Fallen Vampire
Freezing
The infamous strongest girl in the school. story-wise, it's not that great. the development is ..okay I guess? But i like the idea and the concept, as well as the character design. Bridget maybe strong (if not the strongest) but she is like a wang-da (outcast) with the way the other students treat her she had my sympathies. Heads up for classic wimpy guy trope. #sempai x kohai. girl is older than the guy by 2 years a few colored pages at some chapters. Note: This is a manhwa. 100% korean-made. It got really popular that the japanese publishers take note of it and published a japanese version.
Rosario to Vampire
One of my harem story favourites.
W Change
silly girl still wants to be normal even when she's a yakuza daughter and had that amazing fighting prowess? pah. no wai.
Claymore
One of the masterpieces in it's genre. Sorta like Attack on titan. A beautiful gritty classic with death all around. note: despite what it says here, it is already completed. Also: THIS IS SHOUNEN PEOPLE. Get your tags right.
Fate/stay Night
epitome of moe? regardless, the concept is creative and interesting it hooks you in. when this was first launched it was like a bomb that landed, especially the game which spurned into different franchises like the manga and anime. beautiful character design, compelling story. adapted from game and novel Fate franchise
Gunslinger Girl
Thoughtful story. Beautifully tragic but sweet. An actual mature manga despite having teen characters. (This is why I love seinen) for reread/tags.
Hunter X Hunter