What is love letter yoasobi?

Love Letter Yoasobi is a Japanese pop song released by the duo Yoasobi in 2020. The song was written and composed by Ayase and produced by Ayase and Ikura. The lyrics talk about a person writing a love letter to someone they admire, expressing their feelings and hoping for a happy ending. The music video features a group of young people exchanging love letters and communicating through handwritten messages. The song became a hit in Japan, reaching number 1 on the Oricon weekly charts and receiving a platinum certification from the Recording Industry Association of Japan.