When Lin Kang first entered F University, he met several characters with outstanding personalities - He Dong, the most influential "big brother" figure in the school, the rude but sincere Fan Cheng, the smart and naughty Huang Jing, and the senior Wei Dan who made his heart beat...
He fell in love with Wei Dan, but the appearance of his ex-girlfriend Guan Lei put our somewhat indecisive protagonist into a dilemma in his relationship. One is his ex-girlfriend who can't just forget him, and the other is his senior sister who deeply moved him.
He has repeatedly broken the vows he made in his heart, and has been choosing and considering the question of choice. Should he choose her? Or choose her?
Lin Kang moves forward amid contradictions, splitting and reuniting with the fierce and gentle Guan Lei, and at odds with the quiet and beautiful Wei Dan. When Lin Kang finally overcame his inner struggle and firmed up his choice, he found that there were still people who were still wavering••••••
When the colorful paper cranes flew in the wind and finally disappeared, Lin Kang felt indescribable sadness. The green apple I got, the love I lost in the end, it seems everything is irreversible••••••