In Great Sage's recollection, all seems to be smooth sailing for Tempest... but then the oldest of the Demon Lords, Milim Nava, arrives! Rimuru, as Milim's bestie, is appointed by the majority to be in charge of keeping an eye on her. With no knowledge of this, Milim explores Tempest and interacts more with the residents of the city of monsters... and Rigurd keeps track of all the damage she causes along the way in a report for Rimuru. "Rigurd... are you angry?"
The key to living a long life 
is to stay young at heart.
مفتاح عيش حياة مديدة هو أن يبقى قلبك صغيراً
Wenn man so lange lebt,
Los que viven mucho tiempo
han de mantener un corazón joven.
Los que viven mucho tiempo
han de mantener un corazón joven.
Pour vivre très vieux,
il faut rester jeune dans sa tête.
Il segreto per vivere a lungo è mantenere un cuore giovane.
Para viver por muito, muito tempo,
o importante é não deixar a mente envelhecer.
Секрет долголетия — сердце,
не пресытившееся миром.