The "Ayamachi" suggests that the lead character feels responsible for the tragedy.
These titles rarely start with immediate betrayal; they focus on the "corrosion" of the relationship over time. Tsuma Netori Rei Boku no Ayamachi Kanojo no Sen...
In this specific series, the focus is often on the slow, methodical "taking" of the wife or girlfriend ( Kanojo ). The "Ayamachi" suggests that the lead character feels