Also that Eirin is quite small, i'll admit i had never pictured the idea of KoEirins hooking up with Adult Kaguya, i usually envisioned Older Eirins hooking up with any Kaguya be it a ko or an adult, but you know, respecting their original's dynamic.
When we reach 500 yukkuri I will do it seriously*GASP*Princess~, today we reached the 400 yukkuri tag~