A 4-koma anthology of the Toaru series.
**A Chance to Come Back!** A mysterious door stands open, inviting a boy who’s been brutally bullied all his life to take a courageous step forward into the unknown. On the other side, he finds a hoard of priceless artifacts and a world as filled with magic as it is with monsters. The most shocking revelation, however, is that he can bring whatever he wants back with him when he returns to Earth. It won’t be long before this double life changes him forever… *Source: Yen Press, Vol. 1*
**In this action-packed isekai, one gamer finds himself reincarnated in his favorite academy game—but as the villain! Can he change the game and avoid complete ruin?** I don’t know how it happened, but somehow I’ve died and reincarnated into my favorite academy game. And if that wasn’t weird enough, I’m now the depraved and lazy villain, Weiss Fansent, whose misdeeds lead him to a deadly end. Something I’m determined to avoid at all costs. With little time left until the academy’s entrance exams, I have no choice but to dive headfirst into serious and grueling training. Which means swordsmanship with the S-rank adventurer Miruku Abitas, followed by intense magic practice. It was demanding and exhausting, but getting stronger means I have a better chance of avoiding my disastrous end. But I seriously underestimated just how powerful Weiss truly is, and I wind up stunning everyone at the exams! Have I somehow become more powerful than the hero? *Source: Seven Seas Entertainment, Vol. 1*
The fabulously wealthy heir to the Tsuwabuki Concern, Ichiro Tsuwabuki, has arrived inside the next generation virtual reality MMO, Narrow Fantasy Online. His cousin Asuha has asked for his help in finding someone inside the game, and he's come to help her out. Of course, while he's happy enough to help his cousin out, Ichiro also cannot be satisfied with anything but total mastery of whatever he tries. He quickly proceeds to dominate the game world using his natural genius... and his wallet! (Source: J-Novel Club)
A smart, athletic, who handles anything perfectly and unequaled beautiful girl, dies young due to a car accident. And now, while possessing the memories of her previous life, is reincarnated in a fantasy-ish world with swords and magic! In this world all lives were dependent on magicians, however, their numbers decreased every year due to the magic power scattered around the world running out, thus the reliance on magic was coming to an end. This is a story that will lead to the life of a girl relying on the knowledge of her previous life, as she proposes a way to live even without the use of magic while seeking for what it is, and aiming for a wealthier life.
The old man who matches the number is actually a legendary adventurer! The strongest training fantasy from becoming a novelist!! Source: MU
From the first day I got forced to a girl and caught in marriage, In the tenth day or so, the country begins to glare at me and my life will not go well. I will continue to live without losing to such a difficulties (?).
Hikari, a highly popular model hailed as the "Cutest Girl in the World"... The mysterious model turned out to be an ordinary high school student named Kouki Harema! Kouki is troubled by the fact that he feels he's too cute when cross-dressing and can't find other girls cute... But by a twist of fate, he realizes that his classmate, Amamiya-san, is much cuter than him!? An overly confident cross-dressing boy and a diligent girl who shines when polished, a youth romantic comedy overflowing with "cuteness!" (Source: Micro Magazine-sha, translated)
Wealthy girl Shirasagi Chihana woke one day to an empty house. Her father's company had gone under, and her parents had gone off traveling. They left Chihana all on her own to make her way to the boarding high school where she now has to live. Chihana has no idea how to take care of herself, but luckily she soon meets her roomate Megumi and other friends. Now it's up to Chihana's new friends to help her get used to normal life! (Source: MangaHelpers)
The iDOLM@STER: Cinderella Girls anthology by various mangaka.

