Catch! Teenieping OST: Heart to Heart

The group HATSTOHEARTS will sing the opening theme for the Japanese broadcast of season 4 of the animation 'Catch! Teenieping'. SM Entertainment announced that HATSTOHEARTS participated in the OST for 'Sweet & Sour Catch! Teenieping' and sang the opening theme of the same name in Japanese. This marks HATSTOHEARTS' first participation in an OST since their debut.

'Sweet & Sour Catch! Teenieping' tells the story of what happens when the 'Magic Sugar Ball' disappears in a dessert village. The animation will premiere on April 12th on the Japanese broadcaster TV Tokyo's animation program 'Animori!' and will also be broadcast on the children's and animation specialized channel 'Kids Station' starting on the 16th of next month.

HATSTOHEARTS previously released the Japanese version of their song 'RUDE!' in March, and with this OST participation, they continue their activities in Japan. Additionally, a video containing the opening theme song is scheduled to be pre-released on April 8th through the official 'Catch! Teenieping' YouTube channel.

HATSTOHEARTS will perform at the TV Asahi Global Music Festival 'The Performance' held in Yokohama on April 12th and at 'KCON Japan 2026' held at Makuhari Messe in Chiba Prefecture on May 8th. They have demonstrated their digital music power, with 'RUDE!' topping the Circle Chart weekly streaming chart for three consecutive weeks.