The Promise(The Promise สัญญา I ไม่ลืม)

Phupha and Nanfa have been friends since childhood. Phupha's father runs an old coffee shop opposite Nanfa's father's pharmacy. So, the two grew up together closely and experienced quite a lot. But after leaving college, Phupha suddenly disappears from Nanfa's world and hasn't been heard of in the past ten years. Sad and lonely, how will Nanfa start his new life? And how will he meet Phupha again?