The cast of Takeya Masami designed eroge Te To Te Try On pose alluringly at the beach; if they are not alluring enough with their swimwear on, then you can see the nude filtered version below:
More of his art:
This art (saving the nude filter) is by eroge artist たけやまさみ / Takeya Masami, who is moderately well known for his work on a variety of adult games (under the PULLTOP brand).
You may be especially familiar with one of his recent titles, for it was recently released in English: Princess Waltz.
You can see more of his art on the Channel.