Answer:
Haruki's boss Gabriel is right because there is no valid contract
Step-by-step explanation:
Promissory estoppel is when a promise is made from one person to the other that can be relied upon.
This is however not a valid contract, but should be respected to avoid injustice.
A valid contract involves a written or expression of agreement about a particular thing. It involves offer and acceptance.
In this scenario a promise was made and since injustice cannot be established, Gabriel can decide not to honor the promise.