Kimi ga Kureta Mono

"Kimi ga Kureta mono" is Kudo's first single in four years.[3] It was written and composed by Ayaka.[4] The song, for which Ayaka also recorded backing vocals, was arranged and produced by Akihisa Matsūra, a regular collaborator of both Kudo and Ayaka.[4] "Kimi ga Kureta Mono" marks Kudo's first time collaborating with Ayaka, as well as being the singer-songwriter's first time writing a song for another artist.[5] Ayaka revealed in a press release that she was nervous at first, but when she heard Kudo's final cut of the song, she was moved by the way it all came together.[5] Kudo was glad to have worked with Ayaka on this single, which was released in celebration of her 25th anniversary, and expressed really liking the song Ayaka wrote.[6]

The song is composed in the key of E-flat major, and Kudo's vocals span from B♭₃ to C₅. Lyrically, the song is about the importance of living authentically. Ayaka writes from the perspective of a protagonist being moved by the realization of all the things she gains from putting an honest foot forward in life.

The midtempo ballad is described as the perfect showcase for Kudo's voice.[7] Ayaka was praised for crafting a dynamic melody with a subtle, but emotional, message.[8] Kudo received acclaim for her "maternal and pointed" vocal performance, which was noted to be a perfect match with the theme of the song.[8]

"Kimi ga Kureta Mono" debuted at number 50 on both the Oricon Singles Chart and the Billboard Japan Hot Singles Sales chart.[9][10] It charted on the Oricon Singles Chart for three weeks and Oricon reports total sales of 2,000 copies.[11]