Dokkoida!? (2003)

Being just a normal student without a special talent, Makoto Naegi wins a lottery to attend the prestigious Hope's Peak Academy where only the top prodigies attend. However, instead of this being the beginning of a wonderful high school life, it's a ticket to despair, because the only way to graduate from Hope's Peak Academy is to kill one of your fellow students or be one of their victims.

When a stray black cat named Kuro crosses Mahiru Shirota's path, the high school freshman's life will never be the same again. Kuro is, in fact, no ordinary feline, but a servamp: a servant vampire. While Mahiru's personal philosophy is one of non-intervention, he soon becomes embroiled in an ancient, altogether surreal conflict between vampires and humans.

Fuutarou Uesugi is a poor, antisocial ace student who one day meets the rich transfer student Itsuki Nakano. They argue but when Uesugi realizes he is to be her tutor, he tries to get on better terms. While trying to do so he meets four other girls.

Our MC finds out that his school requires him to join a club and during his reluctant search he stumbles upon Tejina-senpai attempting magic tricks in her clubroom. Tejina-senpai has massive stage fright however and so now that she has an audience her attempts are simply comedic.

Oreimo follows the daily life of an ordinary high school boy named Kyousuke Kousaka. Kyousuke’s younger sister Kirino is a pretty fashion model, but also hides a dark secret of being an otaku of adult games. Kyousuke is the only person to whom Kirino reveals her hidden obsession and other issues.

Nariyuki Yuiga is in his last and most painful year of high school. In order to gain the “special VIP recommendation” which would grant him a full scholarship to college, he must now tutor his classmates as they struggle to prepare for entrance exams. Among his pupils are “the sleeping beauty of the literary forest,” Fumino Furuhashi, and "the Thumbelina supercomputer," Rizu Ogata–two of the most beautiful super-geniuses at the school! While these two were thought to be academically flawless, it turns out that they’re completely clueless outside of their pet subjects…!?

After he saves a bully from a Villain, a normal student is granted a superpower that allows him to attend a high school training academy for Heroes.

To trust is to set yourself up for failure. That’s the lesson Mei Tachibana learned when her heart was broken. She found a solution: never make any more friends. It’s not as easy as it sounds, but it works for Mei. At least it did until handsome and charming Yamato Kurosawa showed up to complicate everything. Mei’s not looking for a white knight. So why did he have to kiss her and ruin everything? Between heartbeats and behind trembling lips the specter of betrayals past, future, and present haunt them both in Say "I Love You"!

One day, high-school boy Yamada bumps into the beautiful girl Shiraishi on the stairs (literally), and their lips touch as they fall. When they regain their wits, they realize that they have swapped bodies. As time progresses, the two realize that this is not the only mysterious happening in the school.

Goddess Ristarte summons Seiya Ryuuguuin, an OVERLY cautious hero to save the world of Gaeabrande. Seiya is obsessed with muscle training and buying extra armor to deal with low level creatures. It’s simply one cautious mission at-a-time for this hero!