Caption: ...someday, I promise that I will once again serve you by your side...So...until that time...please... Because Ojou-sama is much cuter when she's smiling.
I dub this heartbreaking. Now excuse me while I deal with this strange fluid coming from my eyes.
ungh...my heart always aches when i'm dually reminded of how some characters in touhou live longer than their friends. my eyes still get misty when i think of the comic between mystia and mokou (but that was more soul-crushing than heart-breaking)