Quoted By:
Cute girls only
Cute situations and interactions
Yuri undertones
No men*
Final destination.
*Men can exist in the background, as family members to the girls with very occasional appearances, or even as (one) regular comic relief character like Kimura in Azumanga or the Principal in Hidamari, but never as someone that could reasonably be a romantic interest to any of the girls. YAGOO fills this role in Hololive.