Volume 1:1-2. Punch Up (act 1-2)Motoharu is an openly gay, elite architect whose preference is the athletic, pretty boy type. While checking out the well-built construction workers at his favourite hunting ground?the construction site?he found his missing wayward cat Shinobu. A hot-tempered, sarcastic, bratty iron-worker named Kouta insists Shinobu is Nyata his cat. Will Maki be able to tame the vicious pet(s)? (features Misono from Play Boy Blues) 371b4k

Volume 2:
1-2. Punch Up (act 4-5)
Motoharu learns a little bit more about Kouta's past from the youth's ex-classmate.
3. Ohki Kouta's Interview
A little interview detailing Kouta's job.
4. Punch Up (act 6)
Kouta runs into his brother's ex-partner and is made to his painful past.
5. Honeymoon
Fukazu Yuya is going out with Kouta's brother who is a cross-dresser. This chapter focuses on Kouta's little known complicated past.

Volume 3
1-3 Punch Up (act 7-9)
Kouta and Maki happily living together. Are they? Maki feels insecurity about sudden re-appearance of Kouta's first love, Yuya. While Maki tried to let confused Kouta sort out his feelings, catastrophe strikes...!
4. * Maki Motoharu's Consolation *

Volume 4
1-3 Punch Up (act 10-12)
15 years old Kouta is fighting to differentiate himself from his 19-year-old self! Will he ever regain his memories? Does he want to?
4. * My Motoharu is not like this XXX*
Kouta is worried because Motoharu seems to be less perverted than before.

Volume 5
Punch Up (act 13-16)

Separate extras:
'Punch Up Returns 2015' - oneshot from Pink Gold 6
'Hontoni Atta Kowai Punch↑' - oneshot from Pink Gold 7
'Punch↑×P.B.B.'