He Didn't Call Him Big Brother as a Child, but Called Him Hubby as an Adult

Two male leads + younger love interest + childhood sweethearts?

When Lin Jin was a corporate drone, he and Gu An...

Whether Gu An is a big brother or a husband, Gu An can tell the difference.

Whether Lin Jin is a childhood friend or a younger brother, Lin Jin can tell the difference.

Theme: Amid the summer cicadas' cries lies a pure-love confession years in the making.