I'd Do It Again for You, No Matter How Many Times It Takes

Yugo, who is deeply in love with the heroine, Shiina, has witnessed her death countless times. His abnormal love for her has given him the power of a magical gun to transcend space and time. However, every reset comes at a cruel cost: causing her memories to fade one by one. Even so, his burning flame of love never fades. To save Shiina from her untimely demise, and until Yugo can reach the one irrefutable "proof of love"—a kiss—he won't stop pulling the trigger.