You're the Most Childish in the Universe

Blurb:

There's a saying: Companionship is the longest confession of love.

From two bickering rivals, to falling for each other, to confessing their feelings...

Whenever I was in danger, you always appeared at my side first.

Whenever you were sad, I was there with you.

When the plums ripen, the childhood friend will marry his childhood sweetheart.

A little scene:

In college, Cheng Feifei was a somewhat well-known online comic artist. Since her work was so wholesome, her fellow comic fans hoped she would occasionally give them something a little more exciting.

So she secretly downloaded some adult videos for reference.

One day, at the place the two of them shared, Cheng Feifei wrapped herself completely in a blanket and watched an adult video with earbuds in.

Li Yu lifted the blanket and saw her hiding under the covers to watch a movie on a hot day without turning on the air conditioning.