The story picks up from where the previous dj Overload left off.
Hikaru and Yuki have been in a relationship for 5 years. Now at 24, Yuki has progressed to become a high school teacher. He thought Hikaru and he were doing well in their relationship but...?

Rules series timeline:
1) Please (ch5)
-- Hydra dj - Kiss
-- Hydra dj - Kiss After
2) Hydra dj - Skies
3) Hydra 1+2+3+4 (ch1-4)
4) Hydra 3+4+5+6 (ch5-6)
-- Hydra dj - Blue Film First (after Hydra ch8)
-- Hydra dj - Heavenly (between Hydra ch9 and ch10-11)
-- Hydra dj - The Days Before
-- Rules dj - Real Thing
-- Rules dj - Hello Again
5) Lovers and Souls
6) Rules dj - Fragile
7) Vanity **
8) Dreamers High **
13) Rules (volumes 1 & 2)
14) Rules dj - If Winter Comes, Can Spring Be Far Behind?
15) Rules (v3)
16) Rules dj - Song Birds
17) Another Day on the Planet (booklet)
18) Rules dj - Double Trouble
19) Rules dj - Overload
20) Rules: 2nd Season

** doujinshi
also the ones in ( -- ) are doujinshi's