https://www.animehentaivideos2cn.com/v/40462/maria-s15-kuromarus-erotic-battle?hl=zh
This fight with element of hentai is a story of two young people who decide to fight: they the represent element of sexual desire. Maria and Kuromaru have both characters, which are strong and effecting, this is because the two characters are very determined and will fight to the end to get what they want.