Dakara Boku wa, H ga Dekinai.

Ryosuke Kaga encounters Lisara Restall, a soul reaper searching the human world for someone with exceptional power. A pact allows her to draw on his energy to remain there, pulling him into a mission whose conditions and consequences he barely understands.

The search introduces rival supernatural interests and people connected to Lisara's world. As hidden truths begin to affect Ryosuke and those close to him, his involvement becomes more than an inconvenient bargain, demanding responsibility he has little experience of carrying.