OxT, a pop rock duo from Japan, features singer Masayoshi Oishi and guitarist/songwriter Tomohiro Oshima, known as Tom H@ck. They paired up in 2013 on the track “Go Exceed” for television anime series Ace of Diamond, recording “Perfect Hero” for its second season. Their first releases as OxT, “Kimero!!” (2015) and “Bloom of Youth,” were also part of the soundtrack. Their discography expanded to include “Clattanoia” (2015) for Overlord and “Strider's High” (2016) for Prince of Stride, as well as their first two albums OxT Complete Songs of Ace of Diamond (2016) and Hello New World (2018) which ranked at 36 and 19 on the Billboard charts, respectively. Further tracks including “Go Cry Go” and “Silent Solitude” for Overlord, “Union” for SSSS.Gridman, and “Golden After School” for Ace of Diamond, followed shortly after, seeing the duo release their 11th single "Everlasting Dream" from Ace of Diamond: Act II in 2020, and “Hollow Hunger” from Overlord season 4. Their 13th single "Highest" from The Eminence in Shadow dropped in October 2022, followed by "Grayscale Dominator" from season 2 of the series, in 2023.