When Rimuru separated from Riza and Raiko and Anna and Anny. She travel around the world and help many Demi-human from slavery. She also gain some fame they begin to call her Bule Platinum because of her beauty. After travel 100 year she feels bore she wanted to unite with her mom and get head pat from her.
Rimuru then went to Veldanava place to invite Milim to go exploring with her.
Rimuru: "Milim you home? I want to talk to you about something."
Milim:" oh hi Rimuru what do you want to talk to me."
Rimuru: "um do you want to go everywhere with me? Going alone is so boring."
Milim: "Of course! I'm bored too, let me go ask mom first."
Rimuru: "um, I'll wait."
Milim quickly rushed into the house to find Lucia to ask if she could go out with Rimuru. She saw her mother sitting on the sofa with her father, so she rushed towards Lucia.
Lucia: "Milim why are you running around the house like that?"
Milim: "Mom, let me go out with Rimuru, we're going on a trip everywhere."
Veldanava: "Ah, Rimuru, it's been a long time since I've seen her come here. If it's Rimuru, then I'm reassured, so let's go together."
Lucia: "I also agree but remember not to mess around."
Milim: "So I'm going bye mom, bye dad." She then dash out and meet Rimuru "let go Rimuru"
Rimuru:" ok then, so now where you want to go and play."
Milim:" hm how about Ramiris place."
Rimuru:" ye, let go" when Milim join the Tema war she havoc upon the land, eventually causing so much destruction. This make Ramiris have to join the battle to lower the damage she cause to this she also become the demon lord but she doesn't lose her power she grown more stronger and her Intrinsic Skill Small World become stronger, she can now created a pocket dimensions and in that place she is God she can do anything she wanted.
They fly to Ramiris Dwelling of Spirits to see her. They arrived at the place then opened the gate and went in. It a labyrinth that is connected to the Elemental Realm where Fairies and Elementals reside.
Milim:" Ramiris I and Rimuru come to play are you home."
Ramiris:" Hai Hai I am here oh greeting Rimuru and Milim so what make you to come to this place of me. "
Rimuru:" well my mother decided we become adventurer so we take different part. I decided to go everywhere to play or help some who need but I feel bore after 100 year. Now I call milim and you to join my journey."
Ramiris:" hm that a nice idea, I also feel bore here so let go. Let me put a guard in this place." She put a seal in this place make it hard to find for others want to come here. Then make a golem that strong as her.
Ramiris:" ok then let go." They pass through many places including Armed Nation of Dwargon, Puppet Nation Jistav, Sorcerer's Dynasty Sarion.
Especially when they entered Puppet Nation Jistav, all three were warmly welcomed. Kagali herself came out to welcome them. After being saved by Riza she created Puppet Nation Jistav for her children who lived past time some others came to this place and lived here.
Then they tried many food and pleased with it which made Kagali proud. Clayman, Footman and Tear hear about Riza story and have a high respect for Riza and Rimuru.
When they come to Nigh Rose ruled by Luminous Valentine an unexpected thing happened. In a dark place Luminous Valentine sipped her glass of blood wine next to her were three servants Louis, Roy and Gunther. She looked at the screen showing images of Rimuru, Milim, Ramiris.
Luminous: "I've finally been waiting for you, baby. Louis and Roy you to prepare a table for them and me. I want to give her a grand party that will gradually make her mine."
Louis/Roy:" yes master I will do it right away." They when to set meeting while Luminous when to meet Rimuru.
Rimuru: "This place is so beautiful. The blue is like a calm sea."
Milim: "It's really beautiful."
Luminous: "it cannot compare to your beauty, my love, you are the most beautiful thing to me." Her voice rang behind Rimuru's ear while she was hugging him from behind, this made Rimuru blush at Luminous's voice and was surprised by her presence.
Ramiris: "ah Luminous, it's been so long, When I met you in battle I thought you only slaughtered enemies and didn't care about things like this worthy of the title Queen of Nightmare."
Luminous: "those are just bugs, they don't deserve my attention."
Milim: "oh hi, we came here to play."
Rimuru: "um can you let me go, this position is a bit embarrassing." Luminous's hands were touching her waist and buttocks, which made Rimuru blush.
Luminous: "your words are my orders. Wife"
Rimuru: "Who is your wife is all up to you to figure out for yourself."
Luminous: "HAHAHAHA don't you know that your mother married you to me?"
Rimuru: "eh when did my mother marry me to you!!!"
Luminous: "Let me show you that." She transmits the memory of her conversation with Riza to Rimuru, which causes her to lose consciousness.
Milim: "ah she fainted. You did too much."
Ramiris: "That's right, flirt slowly, but why would you go at once like that? Sigh, she must be very shocked."
Luminous: "I already have this in mind, no need for you two to remind me. I will arrange a place for you two to stay and as for Rimuru, I will take her with me." She gently picked Rimuru up and entered her private room.
While everything is peaceful here, a time traveler arrives in this timeline. This made Riza and Veldanava realize that they should see what this person wanted to do first.
??: Looks like we successfully returned to the past and now we have to go find Luminous to talk about Veldora attacking this place.