Heaven's Lost Property

そらのおとしもの (Sora no Otoshimono)

5.4(1)

OtakuDen

7.2(257,925)

MAL Score

Ranked #3616

Popularity #521

Comedy
Ecchi
Romance
Sci-Fi
Supernatural
Harem

Episodes: 13
Duration: 24 min per ep
Aired: Oct 5, 2009 to Dec 28, 2009
Status: Finished Airing

Synopsis

Tomoki Sakurai has spent years waking in tears after dreaming of an angel, a habit that leaves his longtime friend Sohara Mitsuki concerned. Hoping to find an explanation, she turns to Eishirou Sugata—an oddball with an obsession for the sky—who links Tomoki’s recurring dream to the “New World,” a mysterious floating phenomenon that has baffled scientists.

With the New World Discovery Club newly formed, Eishirou arranges an observation outing to investigate the anomaly. The plan takes an unexpected turn when a strange girl falls from above and abruptly declares Tomoki her master. From there, *Heaven’s Lost Property* follows the club’s offbeat everyday life as they encounter more about the otherworldly Angeloids now appearing on Earth.

Otaku Consensus

Heaven's Lost Property lands as a compact 2009 ecchi comedy whose strongest reception comes from Hisashi Saitou’s brisk direction, AIC ASTA’s willingness to stage bizarre gag set pieces, and a cast dynamic that keeps the 13-episode run moving. Critics and fan reviewers consistently single out its dirty humor and absurd everyday scenarios as the reason it remains easy to binge, while the most common criticism is that its pervert-comedy and master-servant harem material can overwhelm viewers who want the sci-fi mystery to take priority.

Why You Should Watch

Watch Heaven's Lost Property if you want a short, chaotic harem comedy that treats its sci-fi and supernatural hooks as fuel for surreal slapstick rather than solemn lore dumps. It scratches the same “alien girl disrupts ordinary school life” itch associated with titles like DearS, but its reputation rests more on punchline density, rural club-room weirdness, and shameless ecchi escalation than on romantic softness. At 13 episodes, it is built for viewers who want a fast seasonal binge with loud character comedy, a kuudere centerpiece in Ikaros, and a soundtrack/theme package tied together by Iwasaki Motoyoshi and blue drops. If you enjoy comedy that flips between absurd club antics, nudity-driven gags, and hints of a larger skybound mythology, this is a defining late-2000s example of that lane.

Key Characters

T
Tomoki Sakurai
Fans tend to remember Tomoki as the engine of the show’s shameless dirty humor: a girl-crazy lead whose selfish impulses are repeatedly undercut by moments of genuine kindness.
I
Ikaros
Ikaros became the series’ signature figure because her kuudere stillness and angelic visual design contrast sharply with the show’s loud, frequently ridiculous comedy.
S
Sohara Mitsuki
Sohara functions as the grounded childhood-friend counterweight, giving the harem comedy a familiar emotional anchor while often reacting to Tomoki’s behavior with physical slapstick.
E
Eishirou Sugata
Eishirou stands out as the eccentric sky-obsessed club founder, the character who keeps the series’ paranormal curiosity visible even when the episode is chasing a gag.

What Makes It Stand Out

1
AIC ASTA produced the 13-episode TV season that aired from October 5 to December 28, 2009, giving the first season a tight one-cour structure rather than the longer sprawl common to some harem comedies.
2
Director Hisashi Saitou’s version is remembered for leaning into rapid tonal collision: school-club routines, surreal comedy, slapstick punishment, and ecchi set pieces are arranged as a rhythm rather than treated as separate modes.
3
Yoshihiro Watanabe handled both character design and chief animation direction, a dual role that helped keep the rounded late-2000s character look consistent across the show’s comedy-heavy episodes.
4
The music side is unusually identifiable for a TV ecchi comedy: Iwasaki Motoyoshi is credited for the score, while blue drops performed the theme songs, giving the series a recognizable audio identity beyond its gag writing.
5
Its tag profile is unusually blunt about the mix: AniList users mark Angels at 85%, Slavery at 79%, School Club at 79%, Kuudere at 76%, Female Harem at 72%, Nudity at 68%, and Surreal Comedy and Slapstick at 60% each.

Fun Facts & Trivia

Fun fact 1: Heaven's Lost Property is adapted from Suu Minazuki’s original work, and later watch-order discussions often direct viewers from the anime into the manga for fuller continuity after the televised material.
Fun fact 2: The show’s English-facing reputation is unusually stable across databases and reviews: it holds a 7.22 MAL score from 257,884 votes, an AniList score of 67/100, and an IMDb listing around 7.1/10 from roughly 2.5K ratings.
Fun fact 3: Despite being an ecchi harem title, its MAL popularity rank of #521 shows that the series reached far beyond a small niche audience in the late-2000s anime catalog.
Fun fact 4: The credited staff includes Yuuko Kakihara on script and Hiromasa Ogura as art director, placing the series’ comedy writing and background presentation under named specialists rather than leaving it as an anonymous fanservice vehicle.
Fun fact 5: Two 2nd key animation credits in the provided staff list, Kentarou Tokiwa and Yuukei Yamada, highlight how even gag-centric television anime depend on layered animation pipelines beneath the more visible director and character designer roles.