Mayuko without "Ayahiko" around has abandoning issues, although being abused all the time and even seeing "Ayahiko" with Takagi still want him come back. Damn...
I think Takagi has liking in Makoto, which in his current "relationship" will get her in trouble as Mayuko thinks "Ayahiko" is cheating with his highschool friend...
Thanks for scanlation!