♪（）♪
Spoilers ahead♪ If you don't mind, drag (invert) to read♪
Literal
This ahead spoiler♪ all-right [attr-な] [person-方] [topic-は] drag (invert) do-[and-て] read [ね]♪
A classic internet-message register, full of blog-style markers: musical notes for emoji effect, casual ね, the net-slang noun ネタバレ ('spoiler,' a contraction of ネタ 'material/content' + ばれる 'to leak'). 方 (かた) is the polite noun for 'person' used to soften addresses to readers. ドラッグ here is the loan 'drag' (as in drag-select), not the drug sense. The parenthetical 反転 'invert' clarifies the meaning — older web forums hid spoilers via white-on-white text you selected to read.