 If you liked
Dual! Parallel Lun-Lun Monogatari
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 ...then you might like
Photon
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From the same Creator (Masaki, Kajishima) and the Tenchi Series.
The Comedy is the same, like the other series that Masaki created.
It's definitely good to relax.
Also if you have ever watched Evangelion or/and a Tenchi Muyo anime than you'll like Dual Parallel! Trouble Adventures, as it's a parody of Evangelion in Tenchi Muyo or rather Masaki Style.