Just a warning about this chapter, though you may feel the urge to, please restrain yourself from punching your screen whenever a certain character opens his stupid mouth.
I just noticed that Mamiya's got some lady-plumber crack going on.
Anyhow, here's the release. I wrote my thoughts on the chapter on the Lovely Manga Blog (LINK).
Links to "Kanojo ni Naru Hi" Chapter 11: (PDF) (Zip)
Next up is "Sabaku no Harem" Chapter 8 followed by a frequently requested oneshot called "One-Day Idol". Please look forward to them both.