User blog comment:KodachiZero/Chain Chronicle V3 on the Wiki + Q&A/@comment-26432452-20161125015456

Start mission :

Start 1: Try battle once Start 2: Try Limit Break twice (?) -> enhance I think Start 3: Win three times Start 4: Kill last enemy using skill Start 5: Connected chain skill Start 6: Enhance Arcana/Weapon/Adding Weapon, 10 times Start 7: Battle once using a lv 20+ arcana (friends does not count) Start 8: Finish using skill + no one dies Start 9: Put Helios in your team and battle 1 time Start 10: Put Alice in your team and battle 1 time Start 11: Put Amatsu in your team and battle 1 time Start 12: Put Esharu in your team and battle 1 time Start 13: Put Celeste in your team and battle 1 time Start 14: Explore 1 time Start 15: Bring an Arcana with lv 10+ Affection to battle once.

Credit : Rabikun on CCForum.