Here is the full list of all 17 Tokyo Necro achievements.
Unlocked all achievements.
Booted up an Ex-Brain for the first time.
Rescued Iria from the trunk.
Encountered Mitsumi at the Military Police HQ.
Met up with Con Su at Snowbound Nirvana.
Played a match with Iria at the Dream of the Red Chamber.
Feasted your eyes on Iria's cosplay.
Went on a date with Con Su.
Saw Con Su's story to completion.
Went on a date with Mitsumi.
Saw So'un and Mitsumi's story to completion.
Saw Ethica and Kiriri's story to completion.
Made contact with Sub-Con.
Saw So'un and Iria's story to completion.
Began searching the network.
Attained all endings and saw Tokyo's story to completion.
Viewed the Liner Notes.