It is ecchi, so no actual storyline needed, trough it has one.
"Main" character is very good. He is quite normal, shy, calm, and, in a way, wise (and have cute & girly face, you’ll see in a last episode ).
Female characters (maids) are deep enough (as for an ecchi). Even if they follow some clichés, each character have it own charm & style in it.
Series leave feeling of something funny, sweet & kind. And, surprisingly, was not too ecchi (in my case).

Chrono is, of course, the star here, he is wise, mysterious, cool, cute. His "girlfriend" (forgot her name ) is just simpleminded village bimbo.
Storyline is good. Fights are near to excellent. Each of them original, few can even be considered as a work of art.
Anyway last episode is must-see, it makes up for every defect in the plot. Very dramatic & touching.

Plot is shallow, I would prefer something more deep.
But situations and characters are quite funny. Some ecchiness. There is also funny but short gender bender situation.
And there is no ridiculousness which is common in lots of nowadays animes.

Main "hero" is stupid, perverted, unreasonable, psychotic.
Plot full of clichés. Simple minded & big boobed (& tsundere) girls count high as always. And sweetest & cutest girly-face here is actually a boy (one of the factor twins).
Only first 5 to 7 series can be seen without damage to viewer psychic.