Emuken!~ Minnade Yareba Kowakunaiitsu~

Manato, Haruki, Shuta and Yusuke become friends when they experience a unique medical exam. The story span over several oneshot chapters: 1.Emuken! Zenkoku Danshi XX Kensa (えむけん!全国男子××検査) 2.Emuken 2 Danshi Yonin Warikan Ecchi!(えむけん２男子四人ワリカンえっち！) 3. 4. 5. The four boys continue their friendship and become even closer.