Madoka by Metamorgirl (http://metamorgirl.blog83.fc2.com)

Part 1: http://metamorgirl.blog83.fc2.com/blog-entry-127.html
Part 2: http://metamorgirl.blog83.fc2.com/blog-entry-128.html

Madoka is about a group of young boys who are cursed by a woman named Madoka. Slowly, their bodies become that of Madoka's, and what worse, so do their minds.

Hmm... I mean they look more like controlled by her but they are fully aware of their forced actions. So not really mind control more like puppetry?

Base +7, Majin420 +8

@Nelhew
Three of them are fully aware of the changes up until #14. That's when their minds were taken over.

Base +7