I just want to try it out:
http://www.mangago.com/read-manga/critical_lovers/tr/97954/ page/73/
The bottom right Christmas ornament.
It's just because of the art.
Thank you!

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"'The lives I've taken will be paid for with my own life.' That's one way to look at it...but it doesn't mean they come back once you die. Lives can also be paid for by the sword; by redeeming yet other lives. That is why 'Hitokiri Battousai' is still alive in the Meiji Era."

don't click this link...

Figured might as well just find all of them:
1. Top right Lotus Eater
2. Top left and Bottom left either one of them. Couldn't distinguish from which one specifically Michizure Policy or Honenuki ni Saretai
4. Bottom Right Zenryousei Ginsei Gakuen Monogatari (Probably)

I think the bottom right is Taiyou no Kishi. It's by the same author as Zenryousei Ginsei Gakuen Monogatari as omiplant mentioned!

You're right. The uniforms are completely identical in this one

Oh, thank you both! I'll go check it (all) out right now!

________________
"'The lives I've taken will be paid for with my own life.' That's one way to look at it...but it doesn't mean they come back once you die. Lives can also be paid for by the sword; by redeeming yet other lives. That is why 'Hitokiri Battousai' is still alive in the Meiji Era."

don't click this link...