True History's End Game has begun when the Map music changes!
Sengoku Rance OST - Sengoku World (v2)The purple Kou option is New Game+ only and activates the Isoroku branch of the story, where Kou is discovered dead and Nobunagula announces his intent to resume ruling over Oda House. 3G suspects something is up and discovers proof that Xavier is possessing him and convinces everybody to rebel, presumably to unite under the Yamamoto banner... but we're not doing that this time.
Visiting Honnouji is pointless, you'll get a little repeating cutscene and nothing more. What we need to do is search for Kou! Ideally you should just go to Owari and do so but you can search in every province you own. But we've been watching the story and already know Honnouji is Nobunagula's base of operations so whatever. You have 4 turns to discover Kou before you get an automatic Game Over in which Rance becomes morose and crosses the bridge back to the main-land.
You might think this means hey, three free turns to do stuff, right? 3G won't let you attack anyone while Kou is missing! ... naturally you can Search for Treasure, Develop Land and Declare War, Explore Dungeons and Battle Panda and stuff. But more importantly that is three extra turns of income to build my army with. If you can be as heartless as I am, you have three turns to diddle around and amass more stuff with. You can Defend during these turns and still get Prisoners/Loot/Stack for it too.
Since the fifth Gourd broke we finally unlock what I should have waited to recruit Choushin for.
Yoink! A great item. Just mind that you can't unequip it.
That scene put Choushin at 7/7 Affection so... well... we might as well. Actually fuck that what a waste of Fans. The scenes are mildly funny and if you Character Clear Choushin Rance will force him to change his name to Ashikaga Shit. But even if we get Score for Character Clearing him, we forfeit that Score if we dismiss him after it... so screw it, we dismiss him now. Pupiiiiiiiiiii! Doing so unlocks the unequipable item I gave him to reduce his Cost. Score!
Then we clear Road to Hades again because we are terrible I guess. Sorry Kou! I give Kazemaru a +3 Affection Gift I get for the clear. For our last Fan we declare war on Iga.
And that's Turn 90.