Rinrin

I need help finding a manhwa title. Fairly recent, pink-haired kid who is hiding her gender and pretends to be a male. Can someone please help

So there's this manhwa/hua I can't seem to remember the title. The onky thing I remember is that the protagonists were once classmates and that they were teased about their names (they were named after stationery brands), and years later (i think?) They meet again.