Ep. 11: Manatsu and friends hold a beach sand art contest, battling a monster and supporting Laura.
Aired on May 9, 2021

Manatsu and her friends plan a sand art contest at the beach with Minori’s suggestion, involving many students. During the event, the group bonds while creating their pieces, but heavy rain on the second day threatens the artwork. Remembering a photo by Laura, Manatsu uses a parachute to shield the creations. Suddenly, Numeri summons a Zenzen Yaraneeda to attack, forcing the four girls to transform and fight. They successfully defeat the tough monster alongside Laura. Afterward, everyone admires the sand art, even though Manatsu’s team did not win. Later, Laura admits her loneliness regarding her inability to join club activities. Manatsu promises to help Laura find a suitable club to join, strengthening their friendship.
Episodes
- Ep. 7 · The Sea Fairy Kururun Arrives at the Beach for a Delivery
- Ep. 8 · The girls share bento lunches while Chongire attacks a food stall with a Yareneeda.
- Ep. 9 · Tropical Club Prepares for Film Shoot Amidst Monster Attack and Makeup Training
- Ep. 10 · Manatsu and friends study together while fighting a powerful Yaraneeda variant that drains motivation.
- Ep. 11 · Manatsu and friends hold a beach sand art contest, battling a monster and supporting Laura.
- Ep. 12 · Disciplinary Committee Confiscates the Aqua Pot Amidst Mermaid Rumors
- Ep. 13 · Mermaid Rumors Spark School Broadcast Chaos and Monster Attack
- Ep. 14 · Tropical Club Preschool Teaching Experience and Bug-Loving Children Encounter Monster
- Ep. 15 · Minori and Laura Swap Bodies After Accidental Jar Incident