A collection of stories:

1. Black Outsider
Amano bumps into his crush Takase for the first time since high school almost 20 years ago. They go out for a drink but, a lovers spat knocks out Amano. When he wakes up he finds himself in high school again!

1.5. BurnOut
Black Outsider extra

2-5. Dorobou to Hatsukoi (A Thief and First Love)
Tachibana Yutaka has a face-to-face encounter with his guilty past when he runs into his high school crush Momoi. But Momoi has a secret too, and has no intention of letting Tachibana run away.

6. Dorobou to Destroyer

6.5. Dorobou to Hatsukoi Extras

Pусский:
У Тачибаны Ютаки есть секрет, связанный с его школьной любовью, Момои-сэмпаем. Даже спустя несколько лет бедняжку мучает совесть. Однако у Момои-сэмпая тоже есть секрет, и на этот раз он не даст резвому кохаю снова сбежать.