These are the friend events. You must have every friend with "full hearts" then it's just a matter of engaging the event
Amagurina
•Sakura & Hinata
•Tsunade & Sh iz une
•Sai, Neji & Hinata
Barbe-Q
•Kankuro & Shino
•Yamato & Tsunade
•Rock Lee, Guy & Choji
Leaf Village Cafeteria
•Shikamaru, Kiba & Shino
•Kakashi, Yamato & Iruka
•Choji, Kiba & Rock Lee
Dumpling Shop
•Sakura, Ino, Tenten
•Sai & Ino
•Shikamaru, Temari & Konohamaru
Sunagimo Estate (Located in the Sand Village)
•Guy & Kakashi
•Gaara, Kankuro & Temari
•Gaara, Neji & Tenten