Don't Be Cruel, Vol. 8 (Viz Media)

It's been a while since Maya and Nemugasa have had any alone time, so they can't help but go a little overboard when they finally see each other! But later that same night, Maya sneaks out to help his friend Ruka after he's had a severe asthma attack.

When Nemugasa asks him the next morning where he went, Maya quickly changes the subject.