Batten Robomaru (1982)

Nobunaga was a teacher who was waiting for that kind of dating sim event to happen in real life. One day, a 14 year old girl named Kicho appears in front of him, saying that she's his wife?! Apparently she came from the Warring States era and seems to have mistaken Nobunaga for the Oda Nobunaga and tells him that she wants to have his children. An age-gap love comedy featuring a teacher with a dating sims brain and a princess with a warring states era brain!!

With his secret identity now revealed to the world, Ben Tennyson continues to fight evil as a superhero with the help of the newly acquired Ultimatrix.

Issei Hyodo is your average perverted high school student whose one wish in life is to have his own harem, but he's got to be one of the unluckiest guys around. He goes on his first date with a girl only to get brutally attacked and killed when it turns out the girl is really a vicious fallen angel. To top it all off, he's later reincarnated as a devil by his gorgeous senpai who tells him that she is also a devil and now his master! One thing's for sure, his peaceful days are over. In a battle between devils and angels, who will win?

Ichiro Sato is about as average as a student can get... except for his above-average ability to land himself in totally awkward, intensely risqué situations with his no-nonsense teacher, Kana Kojima! Ichiro has his hands full dealing with these steamy shenanigans and unexpected encounters in the most unlikely places. At least it can’t get any worse, right?

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 dying of overwork in the real world, I’m reincarnated as an immortal witch, and I spend 300 years enjoying a relaxing life. At some point, though, I end up at level 99! All those years spent killing slimes to make the money to pay the bills gave me a ton of experience points. Rumors of the level 99 witch spread, and soon I’m up to my ears in curious adventurers, duelist dragons, and even a monster girl calling me her mom! I’ve never been on an adventure, but I’m the strongest in the world… What’s going to happen to my relaxing life?!

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.

"If you blush, you lose." Living by this principle, the middle schooler Nishikata gets constantly made fun of by his seat neighbor Takagi-san. With his pride shattered to pieces, he vows to turn the tables and get back at her some day. And so, he attempts to tease her day after day, only to find himself victim to Takagi-san's ridicule again sooner than later. Will he be able to make Takagi-san blush from embarrassment even once in the end?

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.

Itsuki Hashima is a light novelist obsessed with little sisters, strictly focusing on them when he writes his stories. Despite his personality, he's surrounded by a tight circle of friends, including a beautiful genius writer who loves him, a big-sisterly college classmate, a fellow male writer, a sadistic tax accountant, his editor, and Chihiro, his perfect younger step-brother who takes care of the housework and cooking. As the story progresses, the underlying conflicts of dreams and goals surface, as each character attempts to achieve their dreams, in their own way.