Wow, this thing reads like it got canned really rapidly an unexpectedly.
ch 21 smash cuts to a rapidly escalating end game, then the last ch is just a final end +epilogue that ends good but makes little since we‘re never shown or told why Liche decided to look for Eri your just left to assume she disappeared after jumping of the tower instead of just being found dead at the base.
At the start it was so slow... Than was tooooo fast. Story 6-7\10, yuri 8+\10 , Satisfaction 7\10. You can read it but do not expect something.... Anyway it's 9/10 from me. And I've no idea why xD Thank you for your hard work!