Sakura Trick by Tachi (tabbo) — Ongoing

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Yuu and Haruka were inseparable during junior high but a cruel twist of fate put them on opposite sides of the class when entering senior high. Forced to spend more time with their other classmates, they decide to do something to keep their relationship special. A comedy 4koma.

The official anthology can be found here.

Volume 1
Chapter 0 released Jul 22 '13 Full colour
Chapter 1 released Jun 8 '13
Chapter 2 released Aug 10 '13
BD Vol 4 Bonus Manga released Jun 22 '14
Volume 3
Volume 4
Volume 5
Volume 6