As soon as he entered high school, the first year student Koshiyama Shiki was invited to the mysterious Quiz Study Group led by his senpai. What will Shiki run into when being dragged along by his class mate Mari into the dazzling world of competitive quizzes?!

The story takes place in Shibuya. Ryuhei had always looked up to his older brother as a child. Even after witnessing his mysterious death, Ryuhei grows up to be a cheerful high school student. One day after his daily kickboxing practice, he is bitten by a strange creature calling itself Tris. That night, an unusual dream bothers his sleep. As the rumored "Drops" circulate around the city, Ryuhei is confronted with a force of twisted desire. What is it that awaits him beyond that?

Kurihara Misato was a little more capable than other high school girls, and as a result, she was always alone and couldn't live her life the way she wanted. When she was reincarnated in another world after a tragic accident, she wanted a chance to make normal friends and live a normal life. So she asked God for one thing... "Give me abilities that are average for that world!" But the abilities God gave her were not "average" at all... And now this girl, who's been reborn in a world where magic is real, struggles to find simple, ordinary happiness!

A mini-anime series featuring characters from the D4DJ Groovy Mix mobile game.

Three girls meet for the first time at the start of a new semester in a brand new school. But these aren't just any girls, and this isn't just any school! Dreamcast, Sega Saturn, and Mega Drive might be the names of SEGA gaming consoles, but at Sehagaga Academy, they're also three girls destined for greatness, or at least a nostalgia trip. Wacky hijinks ensue when the girls are tested not on their math and science skills, but on their ability to complete challenges inside (literally!) classic SEGA video games. Can they fight their way through the blocky polygons of Virtua Fighter? Can their dance moves get them high enough ratings in Space Channel 5? And that isn't all! More challenges await on the road to gaining 100 medals in order to graduate, but the Sega Hard Girls won't let something like absurdity keep them down!

Spin-off of the popular music series D4DJ First Mix.

One-man live "Ongeki 4th Anniversary Live - Memories of O.N.G.E.K.I." held at Zepp DiverCity on Sunday, May 15, 2022" Live Blu-ray is a gorgeous edition that includes the MV of successive theme songs including "STARTLINER" as a bonus video in addition to the full live video starring Ongeki Characters.