I have a hard time imagining Yukari would be hypnotized so easily, but then again, what do I know. The protagonist should add Reimu to the harem as well so the two can be together.
(There was a continuity error on page 14, where Yukari's swimsuit(?) turned invisible for a couple panels. Thought it gets taken off after page 15 anyways... Went ahead and fixed it anyways, hopefully it won't stand out too much >_< )