Est ce qu'il faut lui donner le sac de Mari quand on en a l'occasion, ou pas ? Et est ce qu'il faut laisser Mari tuer Kudlak (pour recruter Kaido) ou pas ?

Trouvé !

{// D: Kaido ............................
.................................. [2905] //}

Neither of the 5th Day possible deaths have any effect on getting Kaido's
route. This route essentially takes the same path as Naoya's and doesn't unlock
you Kaido's pic on the title screen (it unlocks Naoya's, actually), but it's a
route nonetheless. Kaido doesn't harp on the Bels and wants power instead,
though.

If you've unlocked both Kaido's and Naoya's routes, and you choose one of them
and then decide you need more time to make up your mind, the one you didn't
select will disappear from the map.

1. Make sure you find out about Kaido's brother and situation in early events,
etc etc.
2. On the 4th day, save Haru at 17:00 by choosing her event. Good idea to have
Yuzu remind you what time it is (she'll offer to do so at the beginning of
the day).
3. If you get the option to BS the fight with Keisuke, don't. If you do,
you'll have to fight Kaido and Midori in the future, and you'll end up
destroying his COMP.
4. No matter how the events of the 5th Day went, talk to Kaido. The dialogue
will change depending, but he'll ask you if you want to team up with him
and get your hands on all the COMPs, putting all the power in your hands.
On the 6th Day, agree to help him find the COMP factory, find it (blue
event), and pick Kaido's last event. You must choose to tell him where the
factory is. This will secure Kaido's route.