Aoi Haru yo Saraba!

Yu Tochimoto's been dragged into the optimistic and bold-acting Kodai Yoshino's world. Yu's uneventful everyday life gradually starts to be filled with uncertainty. He wants to be with Kodai. He means it. He really does... however, one day they'll date girls and marry them... and their relationship will come to an end... He can't stop thinking about that day. Just as Yu is fretting over the inevitable, Kodai shows up at his doorstep. Kodai asks Yu to run away with him! ...Should they? This is a bittersweet story of two teenagers reunited years after college.

(Source: Renta!)

Note: Includes 1 extra chapter.