Can you recommend a very heartwarming B.L novel? Time was of the essence!

I remember that the side story is written as small. It was my birthday. She was preparing a birthday surprise for him at home. Bathing. He placed it on the computer screen and wrote down the instructions. Where can I find my final small next step? The attack is in the lying position. The room is small. If he accepted it, he would directly pounce. It fell…super cute