《恋爱未遂》是一部讲述无数次告白但总是失败的青春单恋故事的网剧。　　姜蔚蓝（孙相渊 饰）好像患有分离焦虑症，当周围没人在旁陪伴时，他就会感到不自在。他的人生目标是能找到一个可以无时无刻陪伴在身边的人。蔚蓝18岁时想要恋爱，但事情并不如他想象般发展，无数次告白总是以失败告终。这次他鼓起勇气向10年好友李诗源（杨惠智 饰）表白，…

Minjae is a highschool teacher during the day, but at dusk, he goes out on the streets and join with youth who are alienated from school and home. Due to an incident, Minjae is put to the test again to protect his students ─ Jigeun and classmates.