Once the Demon King, now a shut-in NEET—Ryusei Narukami's second life is anything but peaceful! When Meteor Hanaori, the Hero who once defeated him, suddenly returns as a normal high school girl, his world is thrown into chaos. Determined to change, Ryusei reenters society as a teacher and ends up teaching at her school! Their explosive reunion reignites the past—and sparks an unexpected love!

For the past two years, cheerful and hardworking Kinme Wakana has run a small laundry shop in the seaside hot springs town of Atami. As she goes about her quiet days, Wakana finds herself drawn into the bittersweet, heartwarming stories of the people around her.

In the mid-21st century, Tokyo's mafia can turn into ether-enhanced Demon Lords, and Braves hunt them down. Yashiro, the Grim Reaper, reluctantly takes a new apprentice named Aki Jogamine, a high school girl training to become a Brave. He soon finds himself dragged into one troublesome case after another. The supernatural story of a scumbag master and his self-proclaimed apprentice begins!