Taeyeon and SHINee Key's friendship is no secret, but Taeyeon's recent comment on Key's Instagram photo is too cute! 

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Key uploaded the following photo on his account of him enjoying food in the street just a few hours ago.

Taeyeon then commented under it, "How pretty. You look like a smart student council president." 

This wasn't the first time Taeyeon had expressed her noona-like affections for Key before! Can you feel the SM love?

Back in May, Taeyeon commented on Key's photo, warning him about air pollution.

She wrote, "Hey, fine dust is crazy. Be careful."  They're like real siblings! 

Taeyeon writes, "W/KEY. Do we look alike!"  How cute are they?