Yuu Tanaka 
A Late-Start Tamer’s Laid-Back Life: Volume 8 [EPUB ebook] 

After making it through the Subterranean Lake with the gang, Yuto and his monsters prepare for the next event: a raid boss battle to celebrate the unlocking of Zone Five! But before the event, Yuto stumbles upon a rare ingredient. As the rumors of his coveted culinary discovery spread, Yuto finds more and more players flocking to him in the hopes of gleaning information about it—even in the middle of the raid boss event! The event brings out new and familiar faces alike. Can everyone manage to work together to take down the boss?