Both actors played together as main casts in the series. They shared great chemistry in both series. Both series are Thai BL dramas, having a well written story. Of you love this series, you can go watch the other. Both actors played their role very well in both drama. Grey Rainbow is noth only entertaining but also educational. It spotlights the bitter truth of difficulties that LGBT couples are experiencing and Dear Doctor is a fictional story about the doctor and the grim reaper who have come acrossed once in their past.
Both are BL love stories with a melancholy and poignant tone in which the couple met years ago when one was still a child and the other who he viewed as a big brother tragically died which continues to haunt the now adult child. However due to supernatural circumstances the two meet again, now the same age, and fall in love. Both dramas have a bittersweet ending.