Ayane Shirakawa
main character
ONA
6.8
My TrackerPLANNING
Episode: 0 / 8
My Score:
Anime DetailsFINISHED
- Format
- web series (ONA)
- Episodes
- 8
- Episode length
- 7 min
- Total watch time
- 56 minutes
- Status
- Finished
- Aired
- January 6, 2020 – February 24, 2020
- Season
- Winter 2020
- Source
- Manga
- Studio
- Studio Houkiboshi
- Director
- Rei Ishigura
- Original creator
- Kaizuka
- Country
- Japan
- AniList score
- 68/100
Estimated watch time
0h 56m
⚡ 2 days at 5 eps/day
Tags & Tropes
Heterosexual97%Nudity94%Large Breasts91%Defloration90%Inseki90%Female Harem82%Incest80%Shimaidon79%Primarily Teen Cast79%Tsundere72%
overview details
Synopsis
"Brother, are we really taking a bath together?" And so, a forbidden bathing experience began. Me, my sister, and childhood friend—one man and two women—are sharing one bath. After involuntarily "overflowing," the sister's secret love come out?! This is a young romantic comedy that won't let you say, "it's over!" (Source: Official Site, translated)
Should you watch Overflow?
Overflow has been met with mixed reactions, with an average AniList score of 68/100 — 42% of 16,680 ratings are 8/10 or higher.
Of the 30.4K AniList users who started it, 3.8% dropped it, so it is rarely abandoned; 26.7K have finished it.
At about 56 minutes in total, it is a short commitment — a weekend binge.
Best for viewers who enjoy Comedy, Hentai, Romance — especially heterosexual, nudity, large breasts, defloration.
Where to Watch Officially
Availability, audio and subtitles vary by region and service.
Main cast & voice actors
Creators & key staff
- Original creator
- Kaizuka
- Director
- Rei Ishigura
- Character design
- Yoshihiro Watanabe
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Overflow FAQ
How many episodes does Overflow have?
Overflow has 8 episodes of about 7 minutes each, roughly 56 minutes in total.
Is Overflow finished?
Yes. Overflow has finished airing — the final episode aired February 24, 2020.
Is there a season 2 of Overflow?
No sequel is listed for Overflow as of October 2026. You can continue the story in the original manga.
Is Overflow based on a manga?
Yes. Overflow adapts the manga by Kaizuka.
Who animated Overflow?
Overflow was animated by Studio Houkiboshi and directed by Rei Ishigura.
Where can I watch Overflow?
Overflow is listed on Coolmic, OceanVeil. Availability varies by region — check the streaming links on this page.