Remembering His Smile

There was a nostalgic boy named Go Siwon who lives an average life with no one's support. He had no parents because his father and mother both died due to car accident recently. Siwon always feels like the world punished him miserably however, despite of the bad things that he experienced, he continue to live his life being a college student and somehow, being a part-time worker in a cafe to support himself in his daily living.

But one day, he encountered an unforgettable moment when he swiped his bus card but didn't accepted it because of insufficient fund and he was embarrassed by unhearted people and laughing at him. It made him hurt so much and can't stop himself from crying but luckily, a man came out from nowhere and saved him from that moment and he smiled genuinely and he said "how dare you to hurt my boyfriend."
Because of that, he recognized the same smile from before who saved him from killing himself.

Is that man was same from before?
That genuine smile, made him motivated to continue and live his life to the fullest.

Will that man will be the cure to Siwon's miserable life or that man will be also a pain to him?

I hope you can support this book.