The post's title on pixiv is 共闘しましょう! Google Translate gives me "Let's fight together!" with alternate translations for 共闘 being "united front" and "joint struggle," so I'm pretty sure it's a team-up.
Triple_Factorial said: The post's title on pixiv is 共闘しましょう! Google Translate gives me "Let's fight together!" with alternate translations for 共闘 being "united front" and "joint struggle," so I'm pretty sure it's a team-up.