User blog comment:B214/High School DxD Hero Discussion/@comment-30924344-20180315180711

https://live.line.me/channels/33283/broadcast/7602413 I definitely believe this a glimpse of what HERO's ending song will be like. The singer is the singer for HERO's ending song. Skip to 44:00. The title of this video is something like "New Song Production Live Stream! Sale on 9th May" and the ending song of HERO will release on this date so it's definitely the ending song she is singing