There are always people who will meet and fall in love somewhere. Love spans time and space, and trust requires no reason. Just as the book says, it is just right, so it becomes a good time and beautiful scenery. "Before I met you, I had already planned to die alone." "Why do you think I would give up eternal life for you?" "I always believe in justice, and we became a miracle."
Multiple personalities: cold on the outside and hot on the inside, sweet at the front and knife at the back, I won't tell you the ending but you'll figure it out yourself
Concept: Love knows no gender, nor does it depend on time