Anonymous letters evoke the thoughts of Chi Huan (che Taixian) for his two former friends. Ji-hwan worked part-time in a coffee shop five years ago. One day he was taking pictures in his spare time. Xiuren (Sun Yizhen) and Jing Xi (Lee Eun-Ju) walked into his lens and walked into his life ever since. Because he fell in love with Hsiu-Jen at first sight, but when Ji-hwan expressed his love to Hsiu-Jen, he was politely refused. But Ji-hwan didn't give up, and he once again begged Soo-Jen to give him a chance in public. Xiuren and Jing Xi both like the straightforward character of Ji Huan. Since then, the three people often walk together and establish a friendship, and all three cherish their friendship very much. But when they felt the vague love between each other at the same time, Xiuren and Jing Xi expressed the embarrassment of the trio to Zhihuan, so the two girls left Zhihuan. Times have changed, and Ji Huan is still unable to face their departure. The emergence of the anonymous letter also made him have the impulse to look for Xiuren and Jingxi. At this time, he knew a little-known secret.
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