Harem/Ecchi, Animanga Democracy Wiki

Harem and Ecchi are both genres that are usually in animes, books and video games, for the harem genre it mostly focused on polygynous or polyandrous relationships, where a protagonist is surrounded by three or more love interest. And the Ecchi genre is generally about the fan service in any content and the female characters are usually sexualized and designed to excite some perverted themes and focusing heavily on their body.

Harem-Premiere-Screenshot-1e - Anime Feminist

Gakuen Mokushiroku: High School of the Dead - Anime - AniDB

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Magika No Kenshi To Shoukan Maou:Volume 4 - Baka-Tsuki

Understanding Manga and Anime

Lolicon - Wikiwand

Animanga Democracy Wiki

You get to live in an anime world, Page 2

Animation Revelation's Animation Blog

Adult (18+) Anime Like Harem in the Labyrinth of Another World