Accel World

Prepare for a full dive! Even in the future, all the advances and innovation in the world can't change the dynamics of the school playground. And for Haruyuki Arita, a fat kid in junior high, that means he's destined to always be at the bottom of the food chain, prime pickings for the school bullies. But when he is approached by Kuroyukihime, a beautiful and aloof upperclassman, Haruyuki's life is turned on its head as he dives into Brain Burst, a mysterious computer program, and the Accelerated World with her help. It's in the Accel World that Haruyuki casts off his depressing reality and takes hold of the chance to become a Burst Linker, a knight to protect his princess! (Source: Yen Press)

Chiaki recently returned from America, enrolling into an all-girls school. Her brother used to tell her stories about a "Snow Black Princess" and her adventures in a magical kingdom before he died. Seeing an opportunity, two of her seniors try to install Brain Burst on her, only to be rejected. Turns out her brother already installed it three years ago on his deathbed, and is an unknowing Avatar. (Source: TV Tropes)

4-koma of the manga/novel.

V.1 - Hayate no Gotoku! V.2 - Zero no Tsukaima, Kage Kara Mamoru! V.3 - Rental Magica \*\*V.4 - Persona 3\*\* \*\*V.5 - Code Geass - Hangyaku no Lelouch\*\* V.6 - Persona 4 V.7 - To Love-Ru V.8 - Shugo Chara! V.9 - Toaru Majutsu no Index \*\*V.10 - Bakemonogatari\*\* V.11 - Love Plus \*\*V.12 - Yu-Gi-Oh 5D's\*\* V.13 - K-ON! V.14 - Nurarihyon no Mago V.15 - Highschool of the Dead \*\*V.16 - Ore no Imouto ga Konna ni Kawaii Wake ga Nai\*\* V.17 - IS V.18 - Denpa Onna to Seishun Otoko V.19 - Boku wa Tomodachi ga Sukunai V.20 - Boku wa Tomodachi ga Sukunai \*\*V.21 - Bakemonogatari\*\* V.22 - Accel World \*\*V.23 - Sword Art Online\*\* \*\*V.24 - Chuunibyou demo Koi ga Shitai!\*\* \*\*V.25 - Maoyuu Maou Yuusha\*\* \*\*V.26 - Hataraku Maou-sama!\*\* \*\*V.27 - Fate/kaleid liner Prisma Illya\*\* \*\*V.28 - Sword Art Online\*\* \*\*V.29 - Inou Battle wa Nichijoukei no Naka de\*\* V.30 - Gundam Build Fighters Try \*\*V.31 - Dungeon ni Deai o Motomeru no wa Machigatteiru darou ka\*\* \*\*V.32 - Gate: Jieitai Kanochi nite, Kaku Tatakaeri\*\* \*\*V.33 - Utawarerumono Itsuwari no Kamen\*\* \*\*V.34 - Hai to Gensou no Grimgal\*\* \*\*V.35 - Kono Subarashii Sekai ni Shukufuku o!\*\* \*\*V.36 - Persona 5\*\* V.37 - Strike Witches V.38 - Kemono Friends \*\*V.39 - Eromanga Sensei\*\* V.40 - Himouto! Umaru-chan \*\*V.41 - Bokutachi wa Benkyou ga Dekinai\*\* \*\*V.42 - Ryuuou no Oshigoto!\*\* V.43 - Gundam Build Divers \*\*V.44 - Asobi Asobase\*\* \*\*V.45 - Goblin Slayer\*\* \*\*V.46 - Go-Toubun no Hanayome\*\* \*\*V.47 - Senki Zesshou Symphogear\*\* \*\*V.48 - Sword Art Online\*\* \*\*V.49 - Mushoku Tensei\*\* \*\*V.50 - Isekai Ojisan\*\* V.51 - Bocchi the Rock! V.Gaiden - Various \*\*V.52 - Kage no Jitsuryokusha ni Naritakute!\*\* \*\*V.53 - Mato Seihei no Slave\*\* \*\*V.54 - Make Heroine ga Oosugiru!\*\* V.55 - Tensei Shitara Dainana Ouji datta node, Kimama ni Majutsu o Kiwamemasu V.56 - Persona 5: The Phantom X