Here is the full list of all 23 Long and Hard... Summer! achievements.
Complete the quest 'Spooky Refrigerator'.
Complete the quest 'Not a Nuisance'.
Complete the quest 'Bare Rivals' and beat Kaname's record in the arcade game.
Complete the quest 'School's Computer'.
Complete the quest 'Leaking Pipe'.
Build a stronger bond (heart level 1) with Yui Harada.
Complete the quest 'The Real Culprit'.
Complete the quest 'Bills, Bills Everywhere'.
Complete the quest 'Someone to Hug'.
Build a stronger bond (heart level 1) with Kaname Mao.
Build a stronger bond (heart level 2) with Kaname Mao.
Build a stronger bond (heart level 3) with Kaname Mao.
Build a stronger bond (heart level 1) with Akari Tanaka.
Build a stronger bond (heart level 2) with Akari Tanaka.
Build a stronger bond (heart level 3) with Akari Tanaka.
Build a stronger bond (heart level 2) with Yui Harada.
Build a stronger bond (heart level 3) with Yui Harada.
Complete the quest 'Sweet Secret'.
Complete the quest 'The Old Babbler'.
Complete the quest 'Party Time!'.
Get at least a 'D' grade till Friday, week 8.
Complete all the levels in the game that you can play on your PC at home.
Get a score of 10 000 or more in the arcade game.