This is Love - After Dark -

R18 side stories from ZIKI Masaya's Futsuu no Renai.

Vol. 1: About Fumihara and Higashi's first time sleeping together. Takes place after chapter 5 in the main story.

Vol. 2: Fumi-san and Higashi are on a summer trip to a hot springs. Lots of making out involved.

Vol. 3: A story about the two jerking each other off. Also filled with their usual heartwarming and lovey-dovey scenes.

Vol. 4: The setting this time is a cliche for a summer story-- their AC had broken down! The two then go shopping at the mall, cool off in jinbei outfits and make out too!

Official English:
Irodori Comics, FAKKU, Renta, Coolmic