Doki Doki Sisters

Doki Doki Sisters (どきどき シスターズ, Dokidoki shisutāzu) is a dating sim game.

Plot
Doki Doki Sisters was bought by King at a TV-game retail store in M-City. It accompanied him to a public bathroom stall where it laid on the floor for a bit. Later, at King's apartment he managed to start the game and experience the character creation sequence before being interrupted by Saitama. Overcome by embarrassment for playing the game, King promptly shuts the TV off and claims to have mistaken the game for another one.

Appearance
The girls seen in the game has petite, almost child like bodies. Some were wearing bikinis. The main girl on the cover has conspicuously large pigtails.

Excerpts
Lightning Max pages: "Let's head to the library, maybe we will find some new information there". We got to the library. Nobody comes here anymore. We can take all the books away and it won't bother anyone. "Come brother, I want to check this out." So I went with my sister. Manga -> 50 Novel -> 51 Newspaper -> 52

Stinger pages: At the same time I grabbed her hand, I heard this disgusting sound, and felt a piercing pain. The bones in my hand shatter into thousand pieces. "I'm sorry brother....It was me, all along!" Immediately after, iron fists come flying towards my face, breaking my jaw. "I won't let you suffer, I will give you a quick death. Farewell, brother". She said that as my vision turns into a sea of red. Back to 1

Genji page: There is no end to this. I decided to dive deep underwater and terminate my robot sister's system functions. I took a deep breath and went under. I cannot hold my breath forever, I need a quick victory...(cut off)

Trivia

 * The game can be bought for 5800 yen.
 * It was noted by King that the voice actress for the main girl sounded boring, but he enjoyed the introduction song.
 * The main girl refers to the player as "Onii-Chan" (big brother).
 * A Choose-Your-Own-Adventure version of this game can be played in the One-Punch Man databook.