hy guys! does anybody remembers a yaoi manga with this scene? the couple slept together an...

hy guys! does anybody remembers a yaoi manga with this scene? the couple slept together and the morning after when the seme wakes up he sees that the uke is putting on swimming slips (I don't know if it's the correct name in english.. :/) however he asks the uke why is he putting on those slips and the uke answers that he has swimming lesson at school that day.. then the seme kisses the uke there (on the slips) and the uke gets hard and he complains "how am I supposed to go to swimming lesson like this?" (with the hard on I mean.... :3) any idea??