I just haven't seen Beel be affected by tit monsters in the past. Not at all. So why now?
My secret hope for the next chapter: Houjou tries to pull a seduction attack on Oga-Beel, to which he reacts confused at best, until Aoi enters the scene. Beel recognizes Aoi and jumps at her and glomps her instead
This outcome would achieve so much at the same time
- Houjou humiliated to the core
- Aoi would definitely freak out completely (she doesn't know of the Oga/Beel switch)
- An awesome narrative for school life would be born
Keeping my fingers crossed that the author is thinking in the same direction ^_^