二次元的好基友三次元的蓝朋友
[èr cì yuán de hăo jī yŏu sān cì yuán de lán péng yŏu]
'A Best Friend in the Anime World and a Blue-Skinned Buddy in Reality' uses the terms '二次元 (2D/Anime world)' and '三次元 (3D/Reality)' to playfully describe friendships bridging fictional and real worlds or differentiating types of friendships based on contexts.