A Valentine shirt?
Sure seems to be. For whatever reason, the Sega Shop online store seems to be releasing various Sonic+Holiday tees. Does anyone dress up for Valentines day? It seems pretty wierd but here's a tee to do so. It uses the neoclassic (new to either 2018 or 2019) "Sonic Cupid Costume" art. It's him, dressed in a white toga thing, with a cupid bow, fake feather wings on his back and holding a valentines card envelope. He dresses up for sports, and Halloween/Christmas, so I guess here he goes again--although it's not super fitting because Sonic and romance aren't really...related?
Of course, the shirt here has a hearts background and "Be Mine?" as the text. This one is a bit of an 'odd duck' product...but it is official and buyable in 2019 online for about 20 dollars in adults sizes.