Ok, looking back, I think I kinda understand the timeline.
First, Lalo's "immortal slaves plan" begin on the 23rd and he manage to win against Baku (ch402, pg13). I think Lalo win because Baku try to run away (in ch 399, pg4, Yakou said if the king run away then he will automatically lose) that's why there's sparks around Baku (ch402, pg13), the vest he's wearing is punishing him.
But, this isn't the end for Baku. In ch399 pg4, Baku is looking for a secret hideout, so I think Baku know about Lalo's "immortal slaves plan" and I think Baku came up with the "secret weapon" (mention on ch401, pg 8 & 9) to have Champ & Ryuusei protect him while Baku run to his secret hideout.
So back to 23rd, after Baku meet Lalo on ch402 pg13, I think Baku manage to somehow run away from Lalo. However, since Baku's "secret weapon" was discovered by Lalo (ch401 pg13 & 15, you see the guy with the walkie-talkie who is Lalo's men & you see on pg14 Baku saying the information was leaked). That may be the reason why Baku haven't reach his hideout yet (ch401 pg14, Baku said since 23rd, he just keep running).
After Baku run away from Lalo, Lalo is trying to track Baku down. And I think before 23rd, Lalo somehow got the developers involved in this (on ch400 pg11, a developer discover the manager's money. Maybe it's Lalo's gift? Or maybe Lalo is giving food to the manager in exchange for real money? The manager accept it so that developers don't starve, on ch 399 pg1, the manager seem to be angry about the food. Anyhow, it's possible that the manager is gathering the single task specialist for Lalo to control). Lalo use the developers to help him track Baku.
This all leads to the 29th, where we saw on ch401 pg1, the developer's security guards is trying to find the "targets" in the Tipa kingdom (we know they are in Tipa because the two players on ch401 pg 1, appear in ch 401 pg 11-12, where we saw an immortal slave from Azura, the slave is probably attacking Tipa), maybe they are talking about Baku's allies. And on the 29th, Baku found Kyara while he was running away. (This all happen on the 29th because on ch401 pg 3, Midara mention it's 2 days before the deadline and more importantly, it was raining when Midara said that. That's why I think, all the scenes where it shows rain, all happen on the 29th)
Now, the question is where is Baku going. We know he's going to his hideout but why and how does that help him win. My theory, and I have no evidence for this, is Baku is running to Shoudo. At this point, the Shoudo kingdom is probably all gone due to the drug except for Leader. Remember that I mention that Baku automatically loses if he try to run away, so Baku loss the throne of Tipa. The only way now for Baku to become King again is through Shoudo. This means that he have to battle against Leader who is probably the King by default. Leader situation isn't really that great right now, we know he have Oofuna (ch 399, pg16) but still, it isn't that great. Maybe Leader have a plan? I don't know, but there's just no evidence right now.
Of course, this is all assuming Lalo haven't defeated Shoudo when Baku meet Lalo on ch402 pg13. But I think when Lalo found out about Baku's "secret weapon", Lalo attack Baku first so Champ & Ryuusei can't level up and leave Shoudo alone for now since Shoudo is pretty much dead now.
Another unknown thing is on ch401 pg3, the developers are in trouble from something. Maybe from Leader's forces? Maybe due to disgruntled players? Maybe from Lalo trying to take even more control from developers? Who knows.
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So to summarise the timeline:
Before 23rd:
(Theory)
- Manager and Lalo have an exchange and Lalo got the developers in his control
On 23rd:
(Facts)
- Lalo's "immortal slave plan" commence when he found out about Baku's "secret weapon"
- Baku's "secret weapon" failed, Champ & Ryuusei didn't level up due to Lalo's "immortal slave plan"
- Baku was caught by Lalo
(Theory)
- Baku run away from Lalo since he already know about Lalo's "immortal slave plan"
- Due to the failure of the "secret weapon" Baku didn't manage to get to his hideout
- Baku keep running away to hideout and plan to take Shoudo kingdom
- Lalo is trying to find Baku
On 29th (raining day):
(Theory)
- Lalo is using the developers to find Baku and his allies
(Fact)
- Baku is still running away and find Kyara's corpse
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At this point, if my theory is correct, I can see why Baku breaks down when he was talking to Kyara. Lalo have the most power right; he taken two kingdoms, he got the developers in his control, and he got his allies. I really don't see how Baku can come back from this.