Official Summary:
The unfamiliar guy who appeared in front of Seo Jaehee, the office worker with a busy life. Remove prejudices against him!

From MangaUpdates:
Jade is told that her childhood friend from China is going to stay at her house. Yet, the grown man who arrives at her door is no longer the sweet boy from her distant memories, rather far from it. As she struggles to re-adjust to their new life together, will she rediscover her childhood crush or simply kick him to the curb?