Guarding My Sweetheart, I Don't Want You to Be Sad

Who joins? Who breaks the tranquility? Who is confused? Who is lonely and missing? Who is heartbroken? Who left silently? Who will accompany you? Who can untie the knot? Who returns? Who has changed? Who turns around? Who is crying again? Who can't bear it, and who is secretly hurt? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.