もちろん、喜んで。

もちろん、喜んで。

Why not? I'd be happy to.

もちろん、喜(よろこ)んで。

Mochiron, yorokonde.

勿論 (もちろん)

of course; certainly; naturally

喜ぶ (よろこぶ)

to be delighted; to be glad; to be pleased; to congratulate; to gratefully accept

Readings: キ、よろこ.ぶ、よろこ.ばす

Meanings: rejoice, take pleasure in