Double Line

Masahiko Sakaki is the head of a furniture import company, happy to be in the casual relationship he's in. He wasn't supposed to fall for his business client, Kazuki Okada... A heartbreaking love story between two very pure adults. Includes a bonus story about what happens after!
(Source: Renta!)
Note: Sakaki also appears as a minor character in Signal, a story set two years prior to the events in "After a Storm".

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