>>713953212
>harem started with Tenchi Muyou
lmao holy shit you are actually fucking retarded aren't you. So much for this being an anime site, you retards are so far from secondary you've skipped over tertiary and landed straight on quaternary.
Picrel isn't even the true starting point of harem anime but it came out some years prior to the drivel you posted.
Actual answer is Urusei Yatsura by sheer technicality by the way.