From cotton candy scans:

Volume One
Behind the school building, at the pool, on the stairs outdoors... Somewhere in these nooks and crannies on campus, someone is experiencing the love of their lifetime.

❤︎ Hajimete no Kiss/My First Kiss:
While helping Tatsumi-senpai hide from his fans, Ena, who usually eats by herself, takes this opportunity to have secret lunches together with him?!

❤︎ Kimimachi Candy/Candy While Waiting for You:
Rina, a member of the school's concert band, always waits for the track-and-field team's Nishimiya on the stairs' landing. She really wanted to confess to him today, but...

Various pairings experience "the happiest event that occurs in one's life" in this gem of an omnibus about youth! Four oneshots included in this volume.

Volume Two
A childhood friend, a kouhai from club activities, an admired senpai... This highly-acclaimed omnibus gathers precious moments between "you and that special person" in a brand-new second volume!

❤︎ Sotsugyou Sugar/Graduation Sugar:
After graduating from high school, her childhood friend Iku is going to Tokyo. Misato wants to finally confess to him today, but...

❤︎ Hajimete wa, Kimi to/My First Time, With You:
It's spring. Right after the opening ceremony, she finds a folding umbrella and a note on her desk. Surprisingly, the sender turns out to be the "grandson of someone who borrowed the umbrella a long time ago" and also the guy Rin is interested in...?!