Hatsukoi no Atosaki

Toru Nishina goes inside a coffee shop to meet a colleague,and he bumps into his old friend from high school,Kohei,who's now the shop's owner. Kohei doesn't seem to remember him at all,though,and only treats him like any old customer there. To be fair,they weren't "just friends," and their last goodbye was painful,to say the least. Will they be able to reclaim the past love they'd once lost...?
(Source: Renta!)
Note: Miyama also appears as a minor character in "After a Storm", set two years before the start of this series.
Included one-shot: Double Line