Family and the "brothers trope". Quite similar so give it a try. Gray Shelter also has a good plot and amazing chemistry amongst the leads.
They both have Lee Jae Bin as a main actor (lead couple) & they're both korean BL !!
Even if Choco Milk Shake is less serious, with a topic more joyful and calm, Gray Shelter is following the path of a BL with well written characters, sad backgrounds, and (to me), realistic characters, with real behaviors
Even if Choco Milk Shake is less serious, with a topic more joyful and calm, Gray Shelter is following the path of a BL with well written characters, sad backgrounds, and (to me), realistic characters, with real behaviors