A lyric video for "Rouden" ("Leakage") sung by Ai Mochizuki (CV: Hina Youmiya) is now available on KADOKAWA's official anime YouTube channel . Ai Mochizuki is a new heroine character who has appeared in the ongoing second season of the TV anime A Couple of Cuckoos . She is a popular online singer and the childhood friend of the protagonist, Nagi Umino. "Rouden" is her signature song in the story, and its lyrics rhyme in Japanese, English, and Chinese. Ai Mochizuki "Rouden" Lyric Video "Rouden" Instrumental Ver. Video RELATED: Idol Group 22/7 Shares A Couple of Cuckoos Season 2 Anime Ending Song Dance Music Video Following the 24-episode first season in 2022, the much-awaited second season of the TV anime adaptation of Miki Yoshikawa's romantic comedy manga A Couple of Cuckoos premiered in Japan on July 8, 2025. Crunchyroll is streaming the series for members in North America, Central America, South America, Europe, Africa, Oceania, the Middle East, CIS and Indian Subcontinent, and describes the story as such: On the way to meet his birth parents, super-student Nagi meets brash Erika, who needs a quick favor. Pose as her boyfriend at dinner so she can avoid an arranged marriage. But things get tricky once they realize they’re heading to the same spot, and her parents still want them wed. How does he ask out his school crush, keep his grades up, and hide his pending nuptials? No one said love was easy! Source : "A Couple of Cuckoos" anime official website
