My interpretation of the chapter (and the manga up to this point):
Eve (still) does not know that Ibusuki is a girl. As a first love zombie and thus the manifestation of Tarou's first love for Ibusuki, Eve's main desire seems to be to have that love be fulfilled--but since she believes Ibusuki is a guy, she thinks that it's impossible for them to go into a relationship, and instead is drawn to other ways of fulfilling that love (i.e. the way other first love zombies disappeared into the painting and the snowglobe). If/when Eve does discover that Ibusuki is a girl, her desire should then flip to wanting Tarou and Ibusuki to get together, which in other words means she'll no longer want to see Tarou.