In 2025, Nanawo Akari marked her 7th year since major debut, and "Ashita no Watashi ni Sachi Are," released in January 2025, reached a wide range of generations from the internet to living rooms and went viral. As her first work of 2026, she has been chosen for a double tie-up: the "Boat Race 2026 CM song" and the second-cour opening theme of the anime "The Classroom of a Black Cat and a Witch"! "Boyzen Girls" is a cheering song themed on Nanawo Akari's signature "let's move forward step by step," with a high-speed band sound inspired by boat racing. "Mugendai Rettousei" is a track produced by tepe, who has arranged numerous songs by DECO*27. It is an upbeat, aggressive track for the first time in a while for Nanawo Akari, a killer tune incorporating elements of mixture rock. Enjoy the worldviews of the two title tracks as two sides of the same coin. The Limited-time Production Edition Blu-ray contains the non-credit opening footage of the second cour of the TV anime "The Classroom of a Black Cat and a Witch." *Limited-time production by the manufacturer until December 31, 2026.