Please note: This is, in my opinion, the greatest romance manga of all time.
It starts off seeming like your typical harem romp ( i strongly dislike harems so this put me off initially), but Jitsu Wa transforms into one of the most well written, character driven stories I have ever read. If I had to sum up Jitsu Wa with two words I would call it "immensely satisfying".
Eiji Masuda's a fantastic author, and Jitsu Wa is a really underrated gem. It'll always have a special place in my heart.
tl;dr - PLEASE read jitsu wa watashi wa