合う => do something together N3
... 反対に => on the contrary N3
Compare
~こと請け合い => I guarantee ... N1
Happens next
[合「あ」]う => To do A together/mutually N4
Secondary Verb
に対して => towards; against; regarding; in contrast with ~​ N3
場合(は) => in the event of; in the case that ~ N4
のに対して => towards; against; regarding; in contrast with ~ N2
~ににあわず (に似合わず ) => ~Different from N1
Evaluate
…と (は) はんたい (反対)に => opposition; resistance; antagonism; objection; dissent N3
Compare
に[対「たい」]して/に[対「たい」]しては => In response to (topic) A, in regards to A, considering A, in contrast to A N3
Reason, Result, Response
に[対「たい」]して/に[対「たい」]しては => In response to (topic) A, in regards to A, considering A, in contrast to A N2
Reason, Result, Response