The seiyuu Maaya Uchida uploaded the music video for “CHA∞IN“, their 16th single which is used as the ending theme for the anime series adaptation of the manga Chained Soldier (Mato Seihei no Slave), written by Takahiro and illustrated by Youhei Takemura. In the anime she plays Tenka Izumo.
When portals to a different dimension known as “Mato” appear across Japan, a new resource known as “Peaches” is discovered, which grants unique abilities only to women. However, dangerous monsters called “Yomotsu Shuuki” also haunt the Mato and are responsible for several disasters since then. To combat them, the government formed the Anti-Demon Corps, an elite group of women who received power from the “Peaches”.
One day, a high school student named Yuuki Wakura was returning from school when he suddenly got lost at the entrance to Mato. When he calls for help, he is immediately rescued by Kyouka Uzen, the head of the Anti-Demon Corps’ Seventh Unit. Recognizing her potential and also needing it to make her power more effective, she asks Yuuki to join the Anti-Demon Corps by becoming her slave, a position he may find more enjoyable than he initially thought…