Here is the full list of all 33 1f y0u're a gh0st ca11 me here! 幽铃热线 achievements.
Get S rank on 6th day work
Reach the Good+ ending
Observe all endings
Get C rank on day 0 work
Get B rank on first day work
Get C rank on first day work
Get B rank on second day work
Get B rank on third day work
Get S rank on fifth day work
Get S rank on second day work
Get C rank on second day work
Get S rank on third day work
Get S rank on fourth day work
Get B rank on fourth day work
Get A rank on 6th day work
Reach the Good ending
Get A rank onfifth day work
Get B rank on 6th day work
Get S rank on day 0 work
Get S rank on first day work
Get A rank on third day work
Get A rank on fourth day work
Get B rank on fifth day work
Reach the Bad ending
A rank on day 0 work
Get B rank on day 0 work
Get A rank on first day work
Get A rank on second day work
Get C rank on third day work
Get C rank on fourth day work
Get C rank on fifth day work
Get C rank on 6th day work
Reach the Bad+ ending