“Onii-chan, let’s kiss a whole lot today, okay?”
I was still a child when I noticed something was off about our house rules.
Perhaps thanks to the influence of our mother, the kiss demon, my four sisters and I would take pretty much any excuse we could to share a kiss.
Good morning kisses, goodnight kisses, and of course, kisses before picking up a call or going to the bathroom.
Since they were all girls and I was the only man in the house, the rules said they had to kiss me.
But one day, I was forced to move to a separate house in order to study.
My sisters were supposed to bring me a late-night snack to help me focus on my studies, but when the time came to decide who would do it, strife ensued.
Thanks to that, a new house rule was introduced:
“The one who gets the most kisses today gets to bring Onii-chan his snack!”
And so, the sweetness of my kiss-filled life with my precious little sisters grew a little more intense.
Would this be the start of a new stage in our loving family life? Would I deepen my bond with one of them, or...?

This is the official English edition, with all patches already included.
* Patch v2.0 - English translation + full review of pictures. Also, the so-called “mother patch”, which allows you to kiss your mom and get the ending with her, which in the Japanese version was a separate addition, is included in this English version initially (note, although there is a root in the game, in the scene review menu with mom do not fall, there is not even a section for it).
* Patch v2.01 - fixes a bug in the original release 2.0 that did not allow to enter the root for the endings in the final part of the game (officially released the necessary fix).
* Patch v2.02 - connects cheat codes that allow you to open the gallery of bonus videos for viewing (see below). For the game is optional.
* “Third person” patch - changes the English text of the dialogs so that Saya speaks of herself in the third person, as she does in the original (not “I love brother”, but “Saya love brother”). This patch is not particularly important, it does not affect the passage, and if you wish, you can simply get rid of it: go to the folder with the game files and rename PATCH.BAK to PATCH.XP3 with a replacement.

Also, in the folder with the game two startup files:
* onii-kiss.exe from the original release v2.0
* onii-kiss-krkrz.exe from the official patch v2.01 which, according to the developers, improves the performance of the game engine.
You can start the game from at least one, at least from another exe-shnik, they are interchangeable, and the game can be played safely with any of them. The game does not require installation, and works fine under any locale, not only Japanese (well, yes, this is English localization).

PS. If you wish, you can change the name of the main character of the game to your own - menu "Settings" - "System" - "Protagonist's Name". The name will change only in the header, not in the dialogs themselves. But Cyrillic is supported, verified.

The gameplay in this game is quite original. There are no options for the protagonist who are used to playing the visual novels of the election. All you can do is kiss, kiss, kiss and kiss all your sisters whenever the opportunity presents itself (when the sister’s face on the screen approaches you). At this point, the cursor changes to a heart, and you only need to click the mouse. You can kiss on any part of the face and neck. If you hesitate or miss, the kiss may be missed. From time to time, a status bar will appear in the upper right of the screen showing your relationship with each of the sisters. If there are not enough kisses, this sister’s root will not work. In some cases, you can choose who to kiss - arrows will appear on the sides of the screen, allowing you to turn to another sister. Such choices appear at the end of each day, when all the sisters have already received a set of kisses, and this determines what root you will go to. To go through the whole root with some sister, you need to choose her three times for the decisive kiss of the day. Of course, if the mini-game with kisses bothers you for some reason, you can switch to the traditional system with text selections - the menu "Settings" - "Text" - "Text Choices Instead of Kiss Minigame". I warn you right away, the elections are very monotonous, and the game is already quite prolonged, so who knows if it will be more interesting for you to play like that. There are six endings in the game - with each of the four sisters (Asahi, Mahiru, Yayoi and Saya), a harem ending and mom-root. Note that the mother’s root, although bonus, can be completed at any time, while the harem root - only after each of the sisters receives at least two crucial kisses (or after entering the cheat code).

Cheat codes allow you to open bonuses for viewing - animated videos with opening and all the endings (except for the "secret" ending of the mother - there is no code for him), comments by voice actresses and fan art artists. These codes do not open any additional scenes or anything else important, and the game will not lose anything if you do not use the codes. The only useful cheat code is to unlock the harem root without wasting time going through all the other root sisters.
Enter codes should be in the menu "Settings" - section "Codes", in the box at the bottom. When you enter the correct code, a message should appear. All valid codes are in the spoiler below (codes from the Japanese version, of course, do not work).
All secret codes
Secret Code List