Um. . . Probably a short story.
In the last life, my junior brother became a demon for love and was willing to die;
After rebirth, the junior brother thought deeply and decided to start the temptation mode and fully pursue the loyal dog senior brother.
[Ps: This is a funny and heartwarming story. The painting style may be magical and the characters may be a little off. If you don't mind the above, please enjoy it!