MARS Vol. 6 (Kodansha, 2019)

Kira and Rei are definitely in love, but no one said love was easy. When a new guy enrolls in their school, he instantly develops a big crush on both Rei and Kira. Gulp! To make matters worse, it turns out that this mysterious stranger is actually a face from Rei's violent past. Slowly, Kira begins to discover Rei's darker side, but she's not so sure she likes what she sees. As scandalous stories and shocking secrets are revealed, Kira hopes beyond hope that their love will be able to conquer all.