Dasei 67 Percent

Description

This comedy manga takes place in a college girl named Yoshizawa's room. Her friends, Itou, Kitahara, and Nishida often stop by, and they run into funny adult-level problems. For instance, there is the day when her friends drop by while Yoshizawa's hungover in bed, and she suddenly realizes that she doesn't have on any underwear under the covers.
Yoshizawa also has unusual problems, like her need for advice on drawing realistic penises in her manga, since she's never encountered one in real life before. There are a lot of quirky things that can happen in a college girl's home.

Type

Manga

Related Series

N/A

Associated Names

67% Inertia

Inertia 67 Percent

Инерция 67%

ยัยเฉื่อย 67% กับหอพักป่วนชวนน็อตหลุด (SIC)

惰性67%

惰性67パーセント

타성 67퍼센트

Groups Scanlating

genderbenderbb2

MangaTranslation

Latest Release(s)

v.7 c.70 by genderbenderbb2 4 years ago

v.7 c.69 by genderbenderbb2 5 years ago

v.7 c.68 by genderbenderbb2 5 years ago

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Status in Country of Origin

9 Volumes (Complete)

Completely Scanlated?

Yes

Anime Start/End Chapter

N/A

User Reviews

N/A

Forum

0 topics, 0 posts

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User Rating

Average: 7.4 / 10.0 (100 votes)

Bayesian Average: 7.14 / 10.0

18%

20%

25%

15%

Last Updated

September 18th, 2025 10:05am PDT - 2 months ago

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Genre

Comedy Ecchi Mature Romance Seinen Slice of Life
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Categories

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Category Recommendations

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Recommendations

Author(s)

Artist(s)

Year

Original Publisher

Shueisha

Serialized In (magazine)

Ultra Jump (Shueisha)

Licensed (in English)

English Publisher

N/A

Activity Stats (vs. other series)

Weekly Pos #636

(+6)

Monthly Pos #2105 (No change)

3 Month Pos #3283

(-559)

6 Month Pos #4145

(-1095)

Year Pos #6956

(+712)

List Stats

On 666 reading lists

On 361 wish lists

On 181 completed lists

On 24 unfinished lists

On 166 custom lists

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User Comments [ Order by usefulness ]

"It's Like Genshiken, But..."

by big_red01027
3 years ago

Rating: 9.0 / 10.0

Okay, not really, with the notable exception that it takes place in college. Given the ubiquity of high school as a setting in manga, we're already in a somewhat unfamiliar place (or, on a forest path which may or may not lead to sweets).

I wanted to love this manga. But as it went on, I had to admit to myself that I merely liked it a lot. The culprit, as usual, is pacing/development. There isn't much of either, especially after volume 7 or 8 (despite the efforts of someone involved in the creation of the manga).

Also,

I wanted to mention the characters a little bit, because their static relationships (for the most part) are simultaneously a highlight and a detriment to the pacing/development as mentioned above. I really have no problem with the main four, other than that Kitahara especially, but also Yoshizawa would obviously be in a "serious relationship" with someone or possibly a couple different guys through the manga's run. For them to be single the entire way through is just silly and unrealistic (not that manga excels in the realism department, but this one in particular seems to be quite a bit more realistic than the average).

Then we have the "new" characters (those introduced after the main four have solidified as a group): Kaminuma, Itsuki, and Tachikawa. Put simply, none of them add anything to the manga. Kaminuma is barely around, and her "relationship" with Itou remains unexplored. Itsuki adds a bit of a "wild card" to the mix with her disregard for personal space, but is mostly relegated to gags and doesn't receive serious examination. And Tachikawa is just shoehorned into the manga fairly late in the run to act as ...sexual harassment for Nishida? Her inclusion doesn't make any sense and adds nothing, as mentioned.

And of course, I couldn't comment on this manga without mentioning the Yoshizawa/Nishida "relationship". There's obvious interest (possibly mutual?) but the mangaka never pulled the trigger. It's definitely not from lack of opportunity; I guess the mangaka just felt that escalating their relationship wasn't in the work's best interest. I think it's the biggest missed opportunity of the manga and one of the main things keeping it at the merely very good level rather than the transcendent work it could easily have been.

Still, it's worth a read. And yes, the female characters are drawn quite well.

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Okay mindless reading.

by apsyda
5 years ago

Rating: 6.5 / 10.0

Being largely based on situational comedy the ability to take a given scenario seriously is where potential laughs go to live or die. In here situations range from pretty great resulting in some genuine belly laughs, to less than porno level, which results in more of a sense of disappointment.
Its just about fully SoL with some sense of an ongoing timeline but its not a manga with much in the way of progression.
The art is good and the softcore scenes are rendered very well for what they are.
Characters are good. Some are more entertaining that others, but none are offensive to follow.
As far as relatability goes (a selling point of this) it can range from very good to leading to a feeling of disconnect between the author's apparently quite strange life experiences and the lives of any other normal human.

Not much to chew on here, but if you're taking a bus ride or something of the sort this is a good time killer.

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a very funny, kinda perverted, down-to-earth title

by Swifft
9 years ago

Rating: N/A

I love this series and series like it. It's kind of like a lewdified Genshiken minus otaku culture; just somewhat unsociable college students doing their thing and lots of jokes that could come straight from reality. I wrote a review for the series praising it in length. The manga is so, so funny. I need more of it. Also, Shimimaru draws really nice bodies.

Full review:
https://terrenceswiff.wordpress.com/2016/04/29/inertia-67/

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