Years ago, astronaut Byakuya left behind precious materials in the belief that his son, the scientifically-gifted Senkuu, would one day find them. In the present, the Kingdom of Science's Kohaku and Ginrou have infiltrated the harem of the Petrification Kingdom’s leader with the help of Amaryllis, a local girl. At first, their mission progresses without a hitch. Unfortunately, an error enacted by Kohaku and Ginrou leads Minister Ibara and the Island’s strongest warrior, Moz, to identify the intruding duo as enemies. Even worse, Moz tails Amaryllis when she returns to inform Senkuu of the news, discovering the scientist's secret hideout. However, Moz's agenda does not align with Ibara's—he wants to dethrone the minister and keep the petrification device for himself. If Senkuu plays his cards right, he could gain a powerful ally and win the war once and for all.

Rami Nana-Hikari's adventures continue as the keeper of the Secret Treasure. A year has passed since the apocalyptic disaster which left a great crater in the center of Edo City. The destruction wrought major economic consequences and while much investment was poured into the public works for the new Edo Castle, the citizens were all feeling the pinch of the recession.

Seina's epic misadventures are moving from the depths of space to his home on Earth. While he's made just as many friends as he did enemies on his journey, it's time to go back to those he loves on his own planet. But he quickly learns that things aren't the same as they used to be.

The second season of Hypnosis Mic: Division Rap Battle - Rhyme Anima. Unlike the first season, which depicted the first division rap battle, it will be set after the second Division Rap Battle.