BL Story series Halloween costumes! (Patreon)

Hi all! I also plan to draw some Halloween costumes for BL Story! I kinda want to go for couple costume for ryukei! Care to give some suggestions? XD And then shall we vote on it? ^^ I would like to hear some for Riku, Fumi and Kaji as well!! ^^ I have some ideas in my head but I would love to hear from you all too lol some suggestions I receive before were so creative!! XD