Kimi to Ikirareru nara Shindemo ii

"I can't remember someone important who was always beside me."
Houri, who lives a very ordinary life, is drawn to a crosswalk and almost gets run over by a truck, but is saved by a man who passes by. The moment he sees the man's face, he has flashbacks of his past life, when the two of them were intimate. The two are led by a super-powerful fate to make love, but the next morning, the man declares that he doesn't remember Houri...!? A story of love that returns until death do them part.

(Source: Libre, translated)

Note: Includes 1 extra chapter.