That chapter is one chapter from the new volume 5 of Punch Up.
These 2 characters are Kouta the main character of Punch Up & Shinobu the main character of Play Boy Blues
WAIT I JUST REALIZED WRONG LINK SORRY GUYS I MEANT THIS
ONE
http://www.mangago.me/read-manga/punch_up/me/tr_chapter-14.3/pg-2/
Oh i know! they are from the manga called Pink to Mameshiba by KURAHASHI Tomo. Kurahashi Tomo's manga are my favourite.
Hey anyone know what Manga this is? http://www.mangago.me/read-manga/punch_up/me/tr_chapter-14.3/pg-3/