相愛性理論 (Sou Ai Sei Ri Ron) (album)

==Background==
"Souaisei Riron" is DECO*27's fifth album. It features only Hatsune Miku, with Topi featured in the chorus for track 13 and as the main vocalist for track 15.
==Preceding and succeeding albums==
LoveGaze.jpg|Love Gazer
ParallelWorld.jpg|Palovrel World
==Track listing==
==Promotional goods==
Included with the album is a DVD featuring PVs for the following songs:
* "Sou Ai Sei Ri Ron"
* "Nisoku Hokou"
* "Ai, think so,"
* "No You, No Me"
First press editions include a 32-page booklet and comes in a three-sided box with special glossy surface finish.
==External links==
===Official===
===Unofficial===
Category:Albums
Category:Japanese albums
Category:Albums featuring Hatsune Miku
Category:Albums featuring Human vocals and voices