The event for the song Lovely Summer was held from August 5-13 2016. It was the fourth event in the game (and the first team competition event).
The token for this event was watermelon (Ja: スイカ, Rom.: suika).
After the event (September 3 - September 7), versions of Lovely Summer performed by the team with the most points (Suzune+Mei) and the one with the highest average points per player (Hinata+Hotaru) were available to play.
- [Lovely Summer] Mei (with art of both Mei and Suzune) (R) (Card #162)
- [Lovely Summer] Mei (with art of both Mei and Suzune) (SR) (Card #163)