Semen Analysis

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Semen Analysis (精液検査 Seieki Kensa, eng. Semen Analysis) is the thirteenth UMEMARO 3D mini-movie collection and sixteenth release overall, released on May 29, 2015.

Semen Analysis
Mini-Movie Collection Vol. 13
Title card of Semen Analysis.
Released May 29, 2015 [DMM]

August 29, 2015 [DLsite]

Length 34:45
Previous Release The Chiropractor -Erotic Este Course-
Next Release Sugimoto Gynecology Clinic ~Nurse Reform Program~
Interactive? Yes
Sales 8400+ (as of 2/20/16)

JPN (DMM): 6015

JPN (DLsite): 1325

US (DLsite): 431

Purchase DLsite (English)


Kayo Shinozaki and Masaaki Ohara appear in a very brief cameo, through archive footage from OMEGA 2.


"There's a men's room in every fertility clinic that is used to extract sperm from men.

In other words, it's a masturbation room.

Before entering the room, customers are handed a special cup, and they have to fill it to a certain degree by ejaculating into it.

However, that amount is far greater than you might expect.

Especially since many of the men who come in have performance issues.

It is said that in some rare cases, a clinic will have a special nurse whose specialty is extraction of semen.

You visit a clinic to check your infertility.

For the checkup, you are asked to fill a very large cup with your semen.

In an individual room, you rub yourself hard. Then, a sultry nurse comes in.

Name: Chiha Rokuhato

Profession: Nurse (in charge of semen collection)"


Because of Sugimoto Gynecology Clinic's placement in the UMEMARO 3D timeline, Semen Analysis takes place between The Chiropractor and the OMEGA saga, many years removed from the former and relatively close to the latter.

The game opens with a monologue from Chiha, detailing how the sterility clinic works in regards to treating its patients. She then enters the sample collection room, where her current patient, Kenji, is watching a movie in order to provide Chiha with the necessary semen samples. Instead of letting him finish, however, Chiha takes matters into her own hands, and offers her own services for him. This occurs in four stages; as each of the first three stages ends, Chiha will have Kenji ejaculate into a collection pan, which is then poured into the semen collection cup.

To begin with, Chiha gives Kenji either a blowjob or a handjob, depending on the player’s choice. Following this, she removes her nurse’s outfit, and gives him either a titjob or an unconventional thigh-job, holding his penis between her thighs and moving up and down on him. Next, Chiha begins to masturbate alongside Kenji; the offer is given for the player to try penetration, but Chiha will shyly brush the offer off. For the final stage, in order to get enough of a sample, Chiha offers to have sex with Kenji, with either her or him in control, depending on the player’s choice.

The game ends with Chiha dismissing Kenji, satisfied that she has collected the sample she needs.


Semen Analysis's production cycle was marked by a much more detailed, open account of the game’s production, with UMEMARO repeatedly posting lengthy, technical posts during the course of the release’s renewed production in February and March.

The game was first alluded to in a blog post by UMEMARO on September 26, 2014, where UMEMARO mentioned it as the next project after The Chiropractor. In that update, UMEMARO revealed that the game would feature nurses, but nothing more was said until February 11, 2015, two months after the release of The Chiropractor, in which UMEMARO revealed a preliminary design for Chiha.

Chiha received several character revisions, each of which were posted on February 12 and 15, and he also mentioned that her design resembled “that character,” lated noted to be Tifa Lockhart of the Squaresoft game Final Fantasy VII in a comment posted on the February 15 post.

Semen Analysis endured significant technical issues, moreso than any other UMEMARO release. On March 17, UMEMARO revealed his animation and rendering rigs, which included no less than three computers used exclusively for rendering, to avoid the numerous crashes that FiberFX had been experiencing. In addition, UMEMARO had upgraded to LightWave 11 for The Chiropractor, but on March 22, he revealed that he’d had to downgrade back to LightWave 7.5 because of his inability to work efficiently with 11.

When Semen Analysis was announced for release on May 26, UMEMARO noted that it had been submitted to both DMM and DLsite; two days later, however, he revealed that DLsite had rejected the release, based on the fact that the game's mosaic censoring was not strong enough (Semen Analysis indeed has the lightest mosaic censoring of any UMEMARO 3D release). Though UMEMARO at first looked into re-rendering the game with a stronger mosaic, he revealed that re-rendering would result in data loss unless a significant delay of the game's release was enacted; because of this, UMEMARO made the decision not to release the game through DLsite initially, instead releasing it exclusively through DMM. As a result, Semen Analysis initially forgoed both an English subtitled release and an Android port, as both tasks are undertaken by DLsite themselves, not UMEMARO. On August 29, however, DLsite released Semen Analysis in Japanese, with an English subtitled release on September 11, featuring a stronger mosaic than the original DMM release. An Android port has not been announced.

The new Mackyplayer

Semen Analysis marks the debut of a new video loop system, which allows for the user to control the videos in a more granular manner. The game can be played in two video perspectives; the traditional "cinematic" mode, featuring multiple angles separate from Chiha and the male character, and a new "POV" mode, which provides a view almost entirely from the male character's perspective, with only a select amount of "cinematic" angles when necessary. Additionally, the video loops are available in three speeds - slow, medium, and fast - and the player can change between them at any time. Advancing in the game is controlled via more visual cues than previous games, including a large "Next" button to advance to the next angle. Additionally, once the player has progressed far enough, the cumshot becomes available as an option button on the sidebar, which progresses the game forward. Interestingly, the speeds and viewing angles, presumably due to being separately rendered, offer slight variations in the scene, depending on the viewing choice made.


  • The time between the release of Semen Analysis and The Chiropractor is the shortest time between releases since the gap between Aya and Kasumi, released within the span of a month in 2002.
    • Incidentally, the shortest gap after these two is the one between Work in Progress and The Chiropractor, the two works immediately preceding Semen Analysis.
      • The run of releases from Work in Progress through The Chiropractor and Semen Analysis represents UMEMARO's most productive span of time since the run of releases from Aya to Sasa.
  • Semen Analysis is the second release in an expected four-release arc detailing Shoko's past, and is the only release to not feature Shoko in any capacity.
  • The beginning of the game, where the male character is watching porn to stimulate himself, briefly features a scene from OMEGA 2, where Kayo and Ohara are having sex in a classroom; this is only the third appearance of archive footage in the UMEMARO 3D canon.
  • Semen Analysis features an increase in video resolution, from the previous standard 720 x 480 to the non-standard 720 x 600.