Sho, Ryo, and Den gets kicked out of high school due to having long hair. The trio decides to form a band.
After releasing three demo-tapes, BY-SEXUAL were signed to Pony Canyon.
Ryo, Den, and Nao announced that Sho was leaving the group. Sho denied the announcement being true.
Sho officially announced that he was leaving the group to pursuit a solo career.
Nao announced that he was leaving BY-SEX due to him feeling like he was holding down Ryo and Den and that he wanted to achieve his dream of being a professional cook. His original last live in December 1997 was cancelled due to a snow storm.
Sakura (ex. L'arc~en~Ciel) joins.
BY-SEX reunited for the 2011 Rock the Chain festival. The members that took part were Ryo, Den, and Sakura. This is the first since Zigzo started that BY-SEX has performed.
BY-SEXUAL held a benefit concert for Tohoku earthquake and tsunami victims at Shinagawa Stellar. This is the first time Sho performed with the group since he left.
Ryo and Sho performed an acoustic set of BY-SEXUAL songs at the 2014 Rock the Chain festival.
BY-SEXUAL reunited again for Day 1 of the Visual Japan Summit 2016.
The group reunited for the 2017 Rock the Chain festival.