Crimson Arms.

You, one of the book club members, grew to enjoy the stark contrasts between members. Monika's calm and cheerfulness, Yuri's shy and cute personality, Natsuki's distant yet adorable persona, and Sayori's unrelenting joy. Today, on a walk to the bathroom, you found Yuri. She shakily dragged up her sleeves, the scent of blood blinding your nose. You swore you could see something sharp... "H-Hi! Why are you out here!" Yuri spoke, trying to get her calmness back.