Spin-off of Kakumeiki Valvrave. The protagonist is Hinomoto Jin, jealous towards his classmate Haruto for his ability to control the Valvrave. He and Ota Nao, a beautiful and popular second year student who lacks confidence in herself, become the pilots of a Kagerou, a unit based on Valvrave II, under L-Elf's commands.

Kakumeiki Valvrave: Under Taker was included as a booklet with the Kakumeiki Valvrave Blu-Ray Disc Box on February 19, 2020.