Responses
chapter 20 is when gunjoon first asks sunbae "what are we?" and sunbae replies "we're officially dating, silly"
sunbae also doesn't hesitate to tell his friend he and gunjoon are official in chapter 21 when they're caught together alongside gunjoon's friend (who is interested in sunbae's friend ;))
these are the earliest instances that i remember where they mention being official <3
He still hasn’t put a label on the relationship or is it just me (⊙…⊙ ) ?