Striker here. I can confirm the CGs of the Hisami Endings have a problem right now, and those will be fixed in 1.14 - are already fixed in code. Furthermore, his bad ending should not lead you to choosing other endings - it was supposed to end there at that scene, but the flags were glitched. In the next build, loading a save a little before his ending should let you unlock the CGs so long as you see the scenes again - even if you skip through them. I'm sorry for the trouble.