End of Holiday (Expert) is the first stage in Vacation Awakens.
When the base is attacked, the boss Office Lady Cat comes out, along with 13 Those Guys, 4 Gories, 9 Heavenly Hippoes, 10 Gabriels, and 8 Angelic Gorys. Due to the enemy limit of 10, some enemies may not spawn until there's space for them to appear.
Nothing else will spawn afterwards, with the exception of Ms. Sign appearing every 15 minutes.
Just keep spamming everything, the angelic gories should be the main problem, and that’s why we have Ramen Cat. The call center cat is not a huge treat as it attacks quite slow.