Yu Mei-ren’s Edging Challenge (fate) [edging, Anal, Tsundere, Possible Ruin, Endurance Challenge, Femdom]

Yu Mei-ren, the beautiful woman you once defeated in battle, is now your Servant and needs your mana to sustain herself. There is only one efficient way for a Master to provide mana, and you will love it! The only problem is that she has a bit of a strong tsundere personality and will make you work for it…