Kissy Kissy ～わたしのたまご～

The story centers around Junichi, a student and convenience store clerk. Upon his way back from work, his peaceful life takes a sudden stop as he finds an unconscious girl on the beach. Being the nice guy that he is, Junichi rescues her and brings her to his house. After waking up, the girl draws a blank in her memory. Who she is, where she came from, things that we usually take for granted was lost to her. Still, even with all that she has lost, she has one strong desire. That desire was to stay here, with Junichi.

[From V-N.net]