My Girlfriend is Hiratsuka Shizuka

Three lifetimes, two of which were defined by relentless struggle. As death approached, Akishin welcomed it with a smile. Amidst the blurring rain and the blood washing over his soul, his greatest wish remained simple: to live an ordinary life... Death, rebirth, fated encounters, and longing. A story of protection, companionship, and a love fought for over a lifetime—and for eternity. — Description from novelcodex.org