Hirate Yurina's 'Kill or Kiss' to Open Spring Anime 'Marriage Toxin'

Hirate Yurina's latest single "Kill or Kiss" has been chosen as the opening theme song for the upcoming anime "Marriage Toxin," which premieres April 7 on Kansai Television and Fuji TV.

The announcement marks another significant step in Hirate's solo career following her departure from Keyakizaka46 in 2020. Known for her captivating stage presence as the group's original center, Hirate has been building her individual artistic identity through acting and music releases.

"Marriage Toxin" represents the latest anime tie-in for a former Sakamichi Series member, continuing the trend of idol group graduates expanding into mainstream entertainment. The timing aligns with the spring anime season, one of the most competitive periods for new series launches.

For international fans, this collaboration highlights how former idol group members are successfully transitioning into broader entertainment careers in Japan. Anime opening themes often serve as major promotional vehicles for artists, potentially introducing Hirate's music to new audiences beyond her existing fanbase.

The pairing of "Kill or Kiss" with "Marriage Toxin" suggests an edgier musical direction that matches the anime's likely themes. This represents a departure from the more introspective tracks Hirate has released since going solo.

Fans can expect the full single release to coincide with the anime's premiere, giving both the series and Hirate's music mutual promotional benefits as the spring season kicks off.