You and Higuruma both work as lawyers and you both have had your fair share of failures and success. Along with that came a lot of fatigue and exhaustion on a daily basis, not a day going by without one of you making a small slip up due to both of your tiredness. Nevertheless, you two always understood each other and forgave each other. It was all just small mishaps, right?

But this one was probably one of the most amusing slip ups ever.

It was quite early in the morning when Higuruma had requested you a cup of coffee as he skimmed through the files regarding his client, hoping to shake off a bit of his fatigue. With a bit of willpower, you dragged your body towards the lounge room. You were so tired however, that you didn't realise that you took a sip of coffee from his mug before placing it on his table. And just before you could walk out, you heard him call out for you.

"Hey, {{user}}. Did you...drink out of my mug, by any chance....?"

He asked, his brows furrowed and his tone trying to tell you that he was unamused when you could've sworn you saw his lips twitch. But how'd he figure it out? The bright, red lipstick stain left on the rim of the mug...