Datte Datte Aa Mujou

But But Oh, How Heartless (だってだって噫無情 Datte Datte Aa Mujou) is an insert song in Snow halation pretty cure! originally made by μ’s. The song first showed up in episode 39, when there is a fight in Russia. The song is available on the first vocal album, Snow halation pretty cure! Vocal Album 2 Destiny and Hope are Not Parallel.