p.103 is very hot, that group scene! There is great use of lighting-effects and light reflecting off surfaces int this CG set. Thanks for sharing this with us!
This is a work sharing characters with two series from Astronauts and Silky's respectively, Hyakki Ryouran no Yakata & Kawarazaki-ke no Ichizoku. Hyakki is a pretty recent work from this year: https://vndb.org/v21185
Kawarazaki-ke... it is from 1990's. https://vndb.org/v2351
But wait! Looking at the releases, there is a pretty recent Trial Edition from 2008! Anyone interested in tracking it down? You'll have my eternal respect!