The official website for High School DxD Hero revealed that the new opening and closing theme song artists would be Miniami and Tapimiru! Minami will perform the opening theme song "Switch," and Tapimiru will perform the ending theme song "Motenai Kuseni (';ω;´)"
Minami has previously performed theme songs for Medaka Box, The Devil is a Part-Timer!, Katanagatari, Muv-Luv Alternative: Total Eclipse, and Infinite Stratos, among others. Tapimiru previously performed the opening theme song for Grimoire of Zero. The series will premiere in Spring (April 2018), and will feature a returning cast. Check out the official promo video for the series down below!
Official website: http://www.haremking.tv/