Is To Heart: Remember My Memories hentai?
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

TV · 2004 · 13 episodes · PG-13 - Teens 13 or older
Drama, Harem, Romance, School, Sci-Fi
Time flies by; Hiroyuki and Akari are 12th-graders now. Both of them and their friends have grown up gradually in someway, physically or mentally, but one of their best friends is missing: the lifelike android Multi. To their surprise, Multi is brought to their campus again without notice, yet she is no longer the same Multi they have known. (Source: ANN)
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