The worst part about playing Imouto no Katachi (Sister's Shape) is getting stuck at some choice, staring at the dense flowchart nodes and having no clue what to pick. This guide solves exactly that problem—every date is clearly labeled, every BE (Bad End) marked, every personal route indicated, and every story-recycling option sorted out. Bookmark this page and check it while playing; it guarantees you won't be forced to restart because of a wrong choice.
Must-Read for Beginners
The game system is very user-friendly with a built-in FLOWCHART. If you get stuck, just click the chapter select button at the bottom-right corner—no need to start from scratch. The "eXXX" codes mentioned in this guide are node names in the flowchart; search them directly to jump to the corresponding position. For first-time players, it's recommended to start with Gin's route, as it contains the most information and helps you understand the world-building. Note: The Forbidden Medicine route contains dark and grotesque content; players with weak psychological resilience should proceed with caution.
Table of Contents
Gin Route Guide
Gin is the woman at the core of the entire story. Playing her route helps you understand what the Tennyo (Heavenly Maidens) and Hagoromo (Robe of Feathers) are all about. This route has two BEs—remember to save.
July 15
1. Go check the lakeside / Go visit her house (These two options have no impact; pick either)
July 17
1. Ask about it
July 19
1. That's not a bear cub
July 23
1. OP (Auto-play story)
July 24
1. Still go look for Gin
July 25
1. Go to the shrine / Go to the shopping district (No impact)
2. Just want to hear Gin say it was an illusion (This is the BE option; ignore if you don't want the BE, skip directly to after BADEND)
3. Better to tell the world
4. Depends on the content
5. BAD END (This is the legendary BE; after watching, restart from e725R-4)
Starting from e725R-4 (Click the FLOWCHART at the bottom-right of the game, select node e725R-4 to enter)
1. Want to know the reason for that monster that couldn't exist in reality
2. Leave everything to Gin
3. Believe
July 27
1. The white thing on top (Picking cyan also doesn't affect the story)
July 28
1. Fits very well
2. That's wonderful
3. Exactly, very cute
4. Anyway, since it fits, forget it
July 29
1. Stay in the room
July 31
1. ◆White (This option only appears in New Game+; ignore if it's your first playthrough—it's determined by your choice on the 27th)
August 2
1. Can't judge now (BE option)
2. BAD END (After watching, restart from e802g-2)
Starting from e802g-2
1. Believe in Gin
2. Gin END
Iroha Route Guide
Iroha is the shrine maiden and Kosuke's childhood friend. This route has two endings—END1 is relatively warm, while END2 involves more of the truth.
Starting from e729R-2
1. Go to the shrine
August 5
1. Return to everyone (Leads to Iroha END1)
2. Iroha END1
Starting from e805i-1
1. Chase the monster
2. Iroha END2
Akane Route Guide
Akane's route is a fanservice route—very short, just take a quick look.
Starting from e729R-2
1. Go to the station front
2. Akane END
Shoko Route Guide
Shoko is Kosuke's cousin. The story in this route is relatively heavy, with two endings.
Starting from e724
1. Investigate Sakuya's matters myself as much as possible
July 26
1. Go check Shoko's room
July 27
1. Play with the one in front of me
2. Call out to her
July 28
1. Go upstream
2. Go to Sachiko's place
July 29
1. Don't ask her (There's a misplaced text here in the original; just ignore it)
August 8
1. Stay by Shoko's side (Leads to Shoko END1)
2. Captivated by Shoko's face
3. Shoko END1
Starting from e808sh-1
1. Go find them
2. Shoko END2
Sachiko Route Guide
Sachiko's route is also a fanservice route—very short.
Starting from e729L-2
1. Ask Sachiko for help
2. Sachiko END
Misato Route Guide
Misato's route is also a short route—use it for quick CG collection.
Starting from e728L-3A
1. Go down
August 1
1. Can't get it out of my mind
2. Misato END
Sakuya Route Guide
Sakuya is Kosuke's real younger sister—the true heroine. This route has two ENDs and one DEAD END—remember to save. To enter the final Forbidden Medicine route, you must clear Sakuya's route first.
Starting from e728L-2
1. Stay down there
August 3
1. After all, she's my sister (BADEND option; actually, this one isn't that bad—worth watching)
2. BAD END (After watching, restart from e803sk-1)
Starting from e803sk-1
1. Very cute
2. Go down the slope in one go (DEADEND option—recommended to watch; contains bloody images)
3. DEAD END (After watching, restart from e803sk-3)
Starting from e803sk-3
1. Head toward the suspension bridge
August 10
1. Lie to Aunt Satsuki (Leads to Sakuya END1; also comes with a bonus scene)
2. Sakuya END1
Starting from e810sk-3
1. Speak the relationship
2. Sakuya END2
Forbidden Medicine Route (TRUE END)
This is the game's true ending, following Sakuya's route. The unlock conditions are quite tedious—must follow the steps carefully.
Unlock Conditions:
1. Among Gin END, Iroha END2, Shoko END2, and Sakuya END2, after clearing two of them, the Frag "Advent～Encounter～" will be added
2. After clearing three, the Frag "Homecoming～Parting～" will be added
3. After clearing all four, the Frag "Curse～Blessing～" will be added
4. After viewing all three of the above Frags, the Frag "Quickening～Beginning～" will be added
5. After viewing all of the above Frags, you can enter the final Forbidden Medicine route
Important Note:
These four Frags can be found at the top of the prologue flowchart, or in the fragment section. After selecting the Forbidden Medicine route, you enter the final route—no choices, just watch straight through to the TRUE END.
Additional Info: As you progress through the game, new frags and scenes will gradually unlock. These won't appear directly in the game routes, but can be found on the game flowchart—once they appear, you can click to enter and view them directly. It's recommended to check the flowchart after clearing each route to see if there are any new nodes.
That's the end of the guide. Enjoy your playthrough—Imouto no Katachi is indeed a great work with solid story and music, worth savoring carefully.
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