A proposition is to provide {HEAD ~ a wearable display} suitable for enjoying {TAIL ~ contents} including images by plural users simultaneously 
suitable for enjoying
A proposition is to provide { HEAD ~ a wearable display } suitable for enjoying { TAIL ~ contents } including images by plural users simultaneously
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH