You can’t. That option it’s only for have the Love Final; with Anna, or with Anna and Charlotte. The Harem End:

Harem end Complete Anna storyline Complete Adrian’s Leaving route Complete Josef’s leaving route Complete Charlotte’s Anna Route Meet Anna and Charlotte in the Living room on Monday

Guide: https://docs.google.com/document/d/1LkXWll0_8kVL23hHWWySoRwKL_4dyluPHeLQsnhvwuE/pub#h.3imvlfyeol2u

For Now you can't tough they said they will rework Adrian a little bit. Now when? Nobody know,s but, if they said so, then it will happen. For now they are reworking Nixxara!