Then you should try FAKE by Matoh Sanami.
Actually, there is! But it's not explicit, it happens twice, but it's really cute and funny!!!!!!!!!!!!!!!!!!!
It only happens towards the end of the series. Vol 7 chapter 19.2 page 13 is the first time. The second time is vol 7 chapter 20 page 7. Enjoy!
Whoa, i want more!- nothing better than gay cops XD