Kimi ni Todoke: From Me to You: Soulmate, Vol. 1 — Karuho Shiina

In college, Kurumi thinks she's found her soulmate in Sawako, her rival-turned-best-friend from high school. But Kurumi can't help wondering if maybe there's someone else out there for her, despite her troubling track record with dating. When the opportunity to attend a mixer crops up, Kurumi drags Sawako along, setting in motion a dangerous love story…